rhsa-2022_8070
Vulnerability from csaf_redhat
Published
2022-11-15 12:39
Modified
2024-11-22 19:14
Summary
Red Hat Security Advisory: dnsmasq security and bug fix update

Notes

Topic
An update for dnsmasq is now available for Red Hat Enterprise Linux 9. 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
The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es): * dnsmasq: Heap use after free in dhcp6_no_relay (CVE-2022-0934) 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 9.1 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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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Richard Johnson"
          ],
          "organization": "Trellix Threat Labs"
        },
        {
          "names": [
            "Petr Men\u0161\u00edk"
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          "organization": "Red Hat, Inc.",
          "summary": "This issue was discovered by Red Hat."
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      "cve": "CVE-2022-0934",
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        "id": "CWE-416",
        "name": "Use After Free"
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      "discovery_date": "2022-02-21T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2057075"
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        {
          "category": "description",
          "text": "A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "dnsmasq: Heap use after free in dhcp6_no_relay",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The severity of this flaw was set to Moderate because this is a 1-byte out-of-bounds write/use-after-free issue where the attacker does not control the data written (it is predefined in a header file). The highest impact is only to availability.",
          "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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          "category": "external",
          "summary": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016272.html",
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          "date": "2022-11-15T12:39:57+00:00",
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            "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": "Moderate"
        }
      ],
      "title": "dnsmasq: Heap use after free in dhcp6_no_relay"
    }
  ]
}


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