rhsa-2021_0150
Vulnerability from csaf_redhat
Published
2021-01-19 15:06
Modified
2024-11-05 23:12
Summary
Red Hat Security Advisory: dnsmasq security update

Notes

Topic
An update for dnsmasq 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
The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es): * dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled (CVE-2020-25681) * dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled (CVE-2020-25682) * dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled (CVE-2020-25683) * dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25684) * dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25685) * dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker (CVE-2020-25686) * dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled (CVE-2020-25687) 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.



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      "title": "dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled"
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    },
    {
      "acknowledgments": [
        {
          "names": [
            "Moshe Kol",
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          "organization": "JSOF"
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Dnsmasq may be run by libvirt and/or NetworkManager. libvirt uses dnsmasq by default to provide DNS service to its guests. NetworkManager may be configured to use dnsmasq to provide DNS service to the system, if a line `dns=dnsmasq` is present in the `[main]` section of the configuration file /etc/NetworkManager/NetworkManager.conf.\n\nIn Red Hat OpenStack Platform (RHOSP) and Red Hat Virtualization (RHV), the dnsmasq package is provided by the underlying Red Hat Enterprise Linux (RHEL) product. RHOSP and RHV are therefore indirectly affected, so please ensure that the underlying RHEL dnsmasq package is updated.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "summary": "https://www.jsof-tech.com/disclosures/dnspooq/",
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        }
      ],
      "title": "dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Moshe Kol",
            "Shlomi Oberman"
          ],
          "organization": "JSOF"
        }
      ],
      "cve": "CVE-2020-25685",
      "cwe": {
        "id": "CWE-326",
        "name": "Inadequate Encryption Strength"
      },
      "discovery_date": "2020-09-03T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1889688"
        }
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        {
          "category": "description",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Dnsmasq may be run by libvirt and/or NetworkManager. libvirt uses dnsmasq by default to provide DNS service to its guests. NetworkManager may be configured to use dnsmasq to provide DNS service to the system, if a line `dns=dnsmasq` is present in the `[main]` section of the configuration file /etc/NetworkManager/NetworkManager.conf.\n\nIn Red Hat OpenStack Platform (RHOSP) and Red Hat Virtualization (RHV), the dnsmasq package is provided by the underlying Red Hat Enterprise Linux (RHEL) product. RHOSP and RHV are therefore indirectly affected, so please ensure that the underlying RHEL dnsmasq package is updated.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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            "attackVector": "NETWORK",
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            "baseScore": 4.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
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      "title": "dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Moshe Kol",
            "Shlomi Oberman"
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          "title": "Vulnerability description"
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        {
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          "text": "dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker",
          "title": "Vulnerability summary"
        },
        {
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        },
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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    },
    {
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        {
          "names": [
            "Moshe Kol",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect the versions of dnsmasq as shipped with Red Hat Enterprise Linux 5, 6, and 7 as they are not compiled with DNSSEC support.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-0:2.79-13.el8_3.1.ppc64le",
            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-0:2.79-13.el8_3.1.s390x",
            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-0:2.79-13.el8_3.1.x86_64",
            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-debuginfo-0:2.79-13.el8_3.1.aarch64",
            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-debuginfo-0:2.79-13.el8_3.1.ppc64le",
            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-debuginfo-0:2.79-13.el8_3.1.s390x",
            "AppStream-8.3.0.Z.MAIN:dnsmasq-utils-debuginfo-0:2.79-13.el8_3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled"
    }
  ]
}


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