RHSA-2021:4292
Vulnerability from csaf_redhat
Published
2021-11-09 17:37
Modified
2024-11-22 17:15
Summary
Red Hat Security Advisory: squid:4 security, bug fix, and enhancement update

Notes

Topic
An update for the squid:4 module is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. The following packages have been upgraded to a later upstream version: squid (4.15). (BZ#1964384) Security Fix(es): * squid: denial of service in URN processing (CVE-2021-28651) * squid: denial of service issue in Cache Manager (CVE-2021-28652) * squid: denial of service in HTTP response processing (CVE-2021-28662) * squid: improper input validation in HTTP Range header (CVE-2021-31806) * squid: incorrect memory management in HTTP Range header (CVE-2021-31807) * squid: integer overflow in HTTP Range header (CVE-2021-31808) * squid: denial of service in HTTP response processing (CVE-2021-33620) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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            text: "An update for the squid:4 module is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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            text: "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nThe following packages have been upgraded to a later upstream version: squid (4.15). (BZ#1964384)\n\nSecurity Fix(es):\n\n* squid: denial of service in URN processing (CVE-2021-28651)\n\n* squid: denial of service issue in Cache Manager (CVE-2021-28652)\n\n* squid: denial of service in HTTP response processing (CVE-2021-28662)\n\n* squid: improper input validation in HTTP Range header (CVE-2021-31806)\n\n* squid: incorrect memory management in HTTP Range header (CVE-2021-31807)\n\n* squid: integer overflow in HTTP Range header (CVE-2021-31808)\n\n* squid: denial of service in HTTP response processing (CVE-2021-33620)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.",
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         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
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               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
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         cve: "CVE-2021-28651",
         cwe: {
            id: "CWE-400",
            name: "Uncontrolled Resource Consumption",
         },
         discovery_date: "2021-05-19T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1962243",
            },
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         notes: [
            {
               category: "description",
               text: "An input validation flaw was found in Squid. This issue could allow a malicious server in collaboration with a trusted client to consume arbitrarily large amounts of memory on the server running Squid. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: denial of service in URN processing",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata.\n\nRed Hat Satellite does not ship the Squid package, however, does consume it from RHEL 7 repository. Product is not affected by this flaw as squid.conf configuration disables all the http_access fragments except the localhost.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
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            },
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               category: "external",
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               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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         ],
         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 7.4,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "CHANGED",
                  userInteraction: "REQUIRED",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H",
                  version: "3.1",
               },
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               ],
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         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: denial of service in URN processing",
      },
      {
         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
               ],
               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
         ],
         cve: "CVE-2021-28652",
         cwe: {
            id: "CWE-401",
            name: "Missing Release of Memory after Effective Lifetime",
         },
         discovery_date: "2021-05-19T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1962246",
            },
         ],
         notes: [
            {
               category: "description",
               text: "A flaw was found in Squid. A parser validation bug could allow a trusted client with Cache Manager API access privileges to trigger memory leaks, potentially resulting in a denial of service against Squid. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: denial of service issue in Cache Manager",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata.\n\nRed Hat Satellite does not ship the Squid package, however, does consume it from RHEL 7 repository. Product is not affected by this flaw as squid.conf configuration disables all the http_access fragments except the localhost.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
         product_status: {
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         },
         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2021-28652",
            },
            {
               category: "external",
               summary: "RHBZ#1962246",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1962246",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2021-28652",
               url: "https://www.cve.org/CVERecord?id=CVE-2021-28652",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2021-28652",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2021-28652",
            },
            {
               category: "external",
               summary: "https://github.com/squid-cache/squid/security/advisories/GHSA-m47m-9hvw-7447",
               url: "https://github.com/squid-cache/squid/security/advisories/GHSA-m47m-9hvw-7447",
            },
         ],
         release_date: "2021-05-10T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2021:4292",
            },
            {
               category: "workaround",
               details: "To mitigate this flaw Cache Manager access privileges can be hardened, for example by requiring authentication or other access controls in the \"http_access\" directive beyond the default IP address restriction. Alternatively, Cache Manager access can be disabled entirely if not needed. To do so, place the following line in `squid.conf` before lines containing \"allow\" :\n\n```\nhttp_access deny manager\n```",
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         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 6.8,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "HIGH",
                  scope: "CHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H",
                  version: "3.1",
               },
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               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: denial of service issue in Cache Manager",
      },
      {
         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
               ],
               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
         ],
         cve: "CVE-2021-28662",
         cwe: {
            id: "CWE-20",
            name: "Improper Input Validation",
         },
         discovery_date: "2021-05-19T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1962254",
            },
         ],
         notes: [
            {
               category: "description",
               text: "An input validation flaw was found in Squid. This issue could allow a remote server to perform a denial of service against all clients using the proxy when delivering HTTP response messages. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: denial of service in HTTP response processing",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "The versions of `squid` as shipped with Red Hat Enterprise Linux 6 and 7 are not affected by this flaw, as the vulnerable code was introduced in a later version of the package.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
         product_status: {
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            ],
         },
         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2021-28662",
            },
            {
               category: "external",
               summary: "RHBZ#1962254",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1962254",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2021-28662",
               url: "https://www.cve.org/CVERecord?id=CVE-2021-28662",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2021-28662",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2021-28662",
            },
            {
               category: "external",
               summary: "https://github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39h",
               url: "https://github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39h",
            },
         ],
         release_date: "2021-05-10T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2021:4292",
            },
            {
               category: "workaround",
               details: "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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         ],
         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 6.5,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "REQUIRED",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
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                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.ppc64le",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.s390x",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.x86_64",
               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: denial of service in HTTP response processing",
      },
      {
         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
               ],
               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
         ],
         cve: "CVE-2021-31806",
         cwe: {
            id: "CWE-20",
            name: "Improper Input Validation",
         },
         discovery_date: "2021-05-19T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1962595",
            },
         ],
         notes: [
            {
               category: "description",
               text: "An incorrect input validation flaw was found in Squid, where it is vulnerable to a denial of service attack against all clients using the proxy. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: improper input validation in HTTP Range header",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata.\n\nRed Hat Satellite does not ship the Squid package, however, does consume it from RHEL 7 repository. Product is not affected by this flaw as squid.conf configuration disables all the http_access fragments except the localhost.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
         product_status: {
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            ],
         },
         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2021-31806",
            },
            {
               category: "external",
               summary: "RHBZ#1962595",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1962595",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2021-31806",
               url: "https://www.cve.org/CVERecord?id=CVE-2021-31806",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2021-31806",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2021-31806",
            },
            {
               category: "external",
               summary: "https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf",
               url: "https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf",
            },
         ],
         release_date: "2021-05-10T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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               restart_required: {
                  category: "none",
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               url: "https://access.redhat.com/errata/RHSA-2021:4292",
            },
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            },
         ],
         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 6.5,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
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               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: improper input validation in HTTP Range header",
      },
      {
         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
               ],
               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
         ],
         cve: "CVE-2021-31807",
         cwe: {
            id: "CWE-400",
            name: "Uncontrolled Resource Consumption",
         },
         discovery_date: "2021-05-19T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1962597",
            },
         ],
         notes: [
            {
               category: "description",
               text: "An incorrect memory management flaw was found in Squid, where it is vulnerable to a denial of service attack against all clients using the proxy. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: incorrect memory management in HTTP Range header",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata.\n\nRed Hat Satellite does not ship the Squid package, however, does consume it from RHEL 7 repository. Product is not affected by this flaw as squid.conf configuration disables all the http_access fragments except the localhost.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
         product_status: {
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         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2021-31807",
            },
            {
               category: "external",
               summary: "RHBZ#1962597",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1962597",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2021-31807",
               url: "https://www.cve.org/CVERecord?id=CVE-2021-31807",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2021-31807",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2021-31807",
            },
            {
               category: "external",
               summary: "https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf",
               url: "https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf",
            },
         ],
         release_date: "2021-05-10T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2021:4292",
            },
            {
               category: "workaround",
               details: "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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         ],
         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 6.5,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
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         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: incorrect memory management in HTTP Range header",
      },
      {
         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
               ],
               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
         ],
         cve: "CVE-2021-31808",
         cwe: {
            id: "CWE-190",
            name: "Integer Overflow or Wraparound",
         },
         discovery_date: "2021-05-19T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1962599",
            },
         ],
         notes: [
            {
               category: "description",
               text: "An integer overflow flaw was found in Squid, where it is vulnerable to a denial of service attack against all clients using the proxy. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: integer overflow in HTTP Range header",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata.\n\nRed Hat Satellite does not ship the Squid package, however, does consume it from RHEL 7 repository. Product is not affected by this flaw as squid.conf configuration disables all the http_access fragments except the localhost.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
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         },
         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2021-31808",
            },
            {
               category: "external",
               summary: "RHBZ#1962599",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1962599",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2021-31808",
               url: "https://www.cve.org/CVERecord?id=CVE-2021-31808",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2021-31808",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2021-31808",
            },
            {
               category: "external",
               summary: "https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf",
               url: "https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf",
            },
         ],
         release_date: "2021-05-10T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2021:4292",
            },
            {
               category: "workaround",
               details: "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 6.5,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
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               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: integer overflow in HTTP Range header",
      },
      {
         acknowledgments: [
            {
               names: [
                  "Joshua Rogers",
               ],
               organization: "Opera Software",
               summary: "Acknowledged by upstream.",
            },
         ],
         cve: "CVE-2021-33620",
         cwe: {
            id: "CWE-20",
            name: "Improper Input Validation",
         },
         discovery_date: "2021-05-11T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1959537",
            },
         ],
         notes: [
            {
               category: "description",
               text: "An input validation flaw was found in Squid. This issue could allow a remote server to perform a denial of service against all clients using the proxy when delivering HTTP response messages. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "squid: denial of service in HTTP response processing",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue has been rated as having a security impact of Moderate. At this stage in their life, Red Hat Enterprise Linux 6 and 7 only accept Important and Critical Security Advisories (RHSAs) and this flaw does not meet these criteria. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
         product_status: {
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            ],
         },
         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2021-33620",
            },
            {
               category: "external",
               summary: "RHBZ#1959537",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1959537",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2021-33620",
               url: "https://www.cve.org/CVERecord?id=CVE-2021-33620",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2021-33620",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2021-33620",
            },
            {
               category: "external",
               summary: "https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f/",
               url: "https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f/",
            },
         ],
         release_date: "2021-05-10T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2021-11-09T17:37:45+00:00",
               details: "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, the squid service will be restarted automatically.",
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               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2021:4292",
            },
            {
               category: "workaround",
               details: "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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            },
         ],
         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 6.5,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
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                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-7:4.15-1.module+el8.5.0+11469+24c223d9.aarch64",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-7:4.15-1.module+el8.5.0+11469+24c223d9.ppc64le",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-7:4.15-1.module+el8.5.0+11469+24c223d9.s390x",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-7:4.15-1.module+el8.5.0+11469+24c223d9.src",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-7:4.15-1.module+el8.5.0+11469+24c223d9.x86_64",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debuginfo-7:4.15-1.module+el8.5.0+11469+24c223d9.aarch64",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debuginfo-7:4.15-1.module+el8.5.0+11469+24c223d9.ppc64le",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debuginfo-7:4.15-1.module+el8.5.0+11469+24c223d9.s390x",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debuginfo-7:4.15-1.module+el8.5.0+11469+24c223d9.x86_64",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.aarch64",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.ppc64le",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.s390x",
                  "AppStream-8.5.0.GA:squid:4:8050020210618131503:b4937e53:squid-debugsource-7:4.15-1.module+el8.5.0+11469+24c223d9.x86_64",
               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "squid: denial of service in HTTP response processing",
      },
   ],
}


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