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{"acknowledgement": "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.", "affected_release": [{"advisory": "RHSA-2017:2836", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "dnsmasq-0:2.76-2.el7_4.2", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-10-02T00:00:00Z"}, {"advisory": "RHSA-2017:2837", "cpe": "cpe:/o:redhat:rhel_eus:7.2", "package": "dnsmasq-0:2.66-14.el7_2.2", "product_name": "Red Hat Enterprise Linux 7.2 Extended Update Support", "release_date": "2017-10-02T00:00:00Z"}, {"advisory": "RHSA-2017:2837", "cpe": "cpe:/o:redhat:rhel_eus:7.3", "package": "dnsmasq-0:2.66-21.el7_3.2", "product_name": "Red Hat Enterprise Linux 7.3 Extended Update Support", "release_date": "2017-10-02T00:00:00Z"}], "bugzilla": {"description": "dnsmasq: heap overflow in the IPv6 router advertisement code", "id": "1495410", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1495410"}, "csaw": true, "cvss": {"cvss_base_score": "8.3", "cvss_scoring_vector": "AV:A/AC:L/Au:N/C:C/I:C/A:C", "status": "verified"}, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-122", "details": ["Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted IPv6 router advertisement request.", "A heap buffer overflow was discovered in dnsmasq in the IPv6 router advertisement (RA) handling code. An attacker on the local network segment could send crafted RAs to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. This issue only affected configurations using one of these options: enable-ra, ra-only, slaac, ra-names, ra-advrouter, or ra-stateless."], "name": "CVE-2017-14492", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/a:redhat:openstack:6", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat Enterprise Linux OpenStack Platform 6 (Juno)"}, {"cpe": "cpe:/a:redhat:openstack:7", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)"}, {"cpe": "cpe:/a:redhat:openstack:10", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat OpenStack Platform 10 (Newton)"}, {"cpe": "cpe:/a:redhat:openstack:11", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat OpenStack Platform 11 (Ocata)"}, {"cpe": "cpe:/a:redhat:openstack:12", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat OpenStack Platform 12 (Pike)"}, {"cpe": "cpe:/a:redhat:openstack:8", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat OpenStack Platform 8 (Liberty)"}, {"cpe": "cpe:/a:redhat:openstack:9", "fix_state": "Not affected", "package_name": "dnsmasq", "product_name": "Red Hat OpenStack Platform 9 (Mitaka)"}], "public_date": "2017-10-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-14492\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-14492\nhttps://access.redhat.com/security/vulnerabilities/3199382\nhttps://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html"], "statement": "Red Hat OpenStack Platform includes the dnsmasq-utils RPM which does not contain this flaw's affected code-paths; Red Hat OpenStack Platform is therefore listed as not affected.\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 'yum update' or 'openstack overcloud update').", "threat_severity": "Critical", "upstream_fix": "dnsmasq 2.78"}