RHSA-2024:0046

Vulnerability from csaf_redhat - Published: 2024-01-03 21:13 - Updated: 2026-03-18 02:30
Summary
Red Hat Security Advisory: squid:4 security update
Severity
Important
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 Important. 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. Security Fix(es): * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724) * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728) * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285) * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286) 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.
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.
CVE-2023-46724

A flaw was found in Squid. Due to an improper validation of the specified index bug, Squid compiled using `--with-openssl` is vulnerable to a denial of service attack against SSL Certificate validation. This flaw allows a remote server to perform a denial of service against the Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-823 - Use of Out-of-range Pointer Offset
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically. https://access.redhat.com/errata/RHSA-2024:0046
Workaround Disable the use of SSL-Bump features: - Remove all ssl-bump options from http_port and https_port - Remove all ssl_bump directives from squid.conf
CVE-2023-46728

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid. This issue may lead to a remote denial of service via gopher URL requests.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 - NULL Pointer Dereference
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically. https://access.redhat.com/errata/RHSA-2024:0046
Workaround To mitigate this issue, create an access list configuration to reject all gopher URL requests: Set ACL directives in your squid.conf file (or equivalent) as follows: acl gopher proto gopher http_access deny gopher Important: This sequence must be placed above any lines starting with "http_access allow" in your configuration. Observation: Some loss of performance may occur with this configuration.
CVE-2023-49285

A buffer over-read flaw was found in Squid's HTTP Message processing feature. This issue may allow attackers to perform remote denial of service.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-126 - Buffer Over-read
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically. https://access.redhat.com/errata/RHSA-2024:0046
Workaround 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.
CVE-2023-49286

A flaw was found in Squid due to an incorrect check of the return value in the helper process management. This issue may allow attackers to perform remote denial of service.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-617 - Reachable Assertion
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically. https://access.redhat.com/errata/RHSA-2024:0046
Workaround 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.
References
https://access.redhat.com/errata/RHSA-2024:0046 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2247567 external
https://bugzilla.redhat.com/show_bug.cgi?id=2248521 external
https://bugzilla.redhat.com/show_bug.cgi?id=2252923 external
https://bugzilla.redhat.com/show_bug.cgi?id=2252926 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2023-46724 self
https://bugzilla.redhat.com/show_bug.cgi?id=2247567 external
https://www.cve.org/CVERecord?id=CVE-2023-46724 external
https://nvd.nist.gov/vuln/detail/CVE-2023-46724 external
http://www.squid-cache.org/Versions/v5/SQUID-2023… external
http://www.squid-cache.org/Versions/v6/SQUID-2023… external
https://github.com/squid-cache/squid/commit/b70f8… external
https://github.com/squid-cache/squid/security/adv… external
https://access.redhat.com/security/cve/CVE-2023-46728 self
https://bugzilla.redhat.com/show_bug.cgi?id=2248521 external
https://www.cve.org/CVERecord?id=CVE-2023-46728 external
https://nvd.nist.gov/vuln/detail/CVE-2023-46728 external
https://github.com/squid-cache/squid/security/adv… external
https://megamansec.github.io/Squid-Security-Audit… external
https://access.redhat.com/security/cve/CVE-2023-49285 self
https://bugzilla.redhat.com/show_bug.cgi?id=2252926 external
https://www.cve.org/CVERecord?id=CVE-2023-49285 external
https://nvd.nist.gov/vuln/detail/CVE-2023-49285 external
https://access.redhat.com/security/cve/CVE-2023-49286 self
https://bugzilla.redhat.com/show_bug.cgi?id=2252923 external
https://www.cve.org/CVERecord?id=CVE-2023-49286 external
https://nvd.nist.gov/vuln/detail/CVE-2023-49286 external
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          "title": "Statement"
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            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "squid: Incorrect Check of Function Return Value In Helper Process management"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.