rhsa-2017_2841
Vulnerability from csaf_redhat
Published
2017-10-02 15:53
Modified
2024-11-05 20:14
Summary
Red Hat Security Advisory: dnsmasq security update

Notes

Topic
An update for dnsmasq is now available for Red Hat Enterprise Linux 5.9 Long Life. Red Hat Product Security has rated this update as having a security impact of Critical. 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): * A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491) Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting this issue.
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.


To clipboard 

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      "text": "Critical"
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    "category": "csaf_security_advisory",
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    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
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        "category": "summary",
        "text": "An update for dnsmasq is now available for Red Hat Enterprise Linux 5.9 Long Life.\n\nRed Hat Product Security has rated this update as having a security impact of Critical. 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.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.\n\nSecurity Fix(es):\n\n* A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491)\n\nRed Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting this issue.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "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.",
        "title": "Terms of Use"
      }
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    "publisher": {
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    ],
    "title": "Red Hat Security Advisory: dnsmasq security update",
    "tracking": {
      "current_release_date": "2024-11-05T20:14:18+00:00",
      "generator": {
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      "id": "RHSA-2017:2841",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Felix Wilhelm",
            "Fermin J. Serna",
            "Gabriel Campana",
            "Kevin Hamacher",
            "Ron Bowes"
          ],
          "organization": "Google Security Team"
        }
      ],
      "cve": "CVE-2017-14491",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "discovery_date": "2017-09-25T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1495409"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "dnsmasq: heap overflow in the code responsible for building DNS replies",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw\u0027s affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\n\nHowever, because all versions of Red Hat OpenStack Platform are based on Red Hat Enterprise Linux, all Red Hat OpenStack Platform users should absolutely upgrade the dnsmasq RPM from Red Hat Enterprise Linux as a matter of urgency using standard update mechanisms (such as \u0027yum update\u0027 or \u0027openstack overcloud update\u0027).",
          "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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          "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.x86_64",
          "5Server-5.9.AUS:dnsmasq-debuginfo-0:2.45-2.el5_9.1.i386",
          "5Server-5.9.AUS:dnsmasq-debuginfo-0:2.45-2.el5_9.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2017-14491"
        },
        {
          "category": "external",
          "summary": "RHBZ#1495409",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495409"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2017-14491",
          "url": "https://www.cve.org/CVERecord?id=CVE-2017-14491"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-14491",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14491"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/vulnerabilities/3199382",
          "url": "https://access.redhat.com/security/vulnerabilities/3199382"
        },
        {
          "category": "external",
          "summary": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html",
          "url": "https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"
        }
      ],
      "release_date": "2017-10-02T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2017-10-02T15:53:55+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",
          "product_ids": [
            "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.i386",
            "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.src",
            "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.x86_64",
            "5Server-5.9.AUS:dnsmasq-debuginfo-0:2.45-2.el5_9.1.i386",
            "5Server-5.9.AUS:dnsmasq-debuginfo-0:2.45-2.el5_9.1.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2017:2841"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 10.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "products": [
            "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.i386",
            "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.src",
            "5Server-5.9.AUS:dnsmasq-0:2.45-2.el5_9.1.x86_64",
            "5Server-5.9.AUS:dnsmasq-debuginfo-0:2.45-2.el5_9.1.i386",
            "5Server-5.9.AUS:dnsmasq-debuginfo-0:2.45-2.el5_9.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ],
      "title": "dnsmasq: heap overflow in the code responsible for building DNS replies"
    }
  ]
}


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