{"id":"CVE-2017-14491","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-14491","generatedAt":"2026-10-28T22:19:52.020Z","title":"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 DNS response.","description":"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 DNS response.","published":"2017-10-04T01:29:03.000Z","lastModified":"2026-06-17T01:06:15.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["thekelleys/dnsmasq","redhat/enterprise linux desktop","redhat/enterprise linux server","redhat/enterprise linux workstation","canonical/ubuntu linux","debian/debian linux","opensuse/leap","suse/linux enterprise debuginfo","suse/linux enterprise point of sale","suse/linux enterprise server","nvidia/linux for tegra","nvidia/geforce experience","huawei/honor v9 play firmware","arista/eos","siemens/ruggedcom rm1224 firmware","siemens/scalance m-800 firmware","siemens/scalance s615 firmware","siemens/scalance w1750d firmware","arubanetworks/arubaos","synology/router manager","synology/diskstation manager"],"epss":{"score":0.86491,"percentile":0.99735,"date":"2026-10-27","history":[{"date":"2026-10-21","score":0.86491,"percentile":0.99739}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2017-10-02","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":42941,"kind":"exploit","title":"Dnsmasq < 2.78 - 2-byte Heap Overflow","url":"https://www.exploit-db.com/exploits/42941","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/42941.py","file":"exploits/multiple/dos/42941.py","published":"2017-10-02","added":"2017-10-02","updated":"2017-10-02","author":"Google Security Research","type":"dos","platform":"multiple","port":null,"verified":true,"codes":["CVE-2017-14491"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://raw.githubusercontent.com/google/security-research-pocs/master/vulnerabilities/dnsmasq/CVE-2017-14491.py"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 86.5%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00003.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00004.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00005.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://nvidia.custhelp.com/app/answers/detail/a_id/4560","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://nvidia.custhelp.com/app/answers/detail/a_id/4561","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/144480/Dnsmasq-2-Byte-Heap-Based-Overflow.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://thekelleys.org.uk/dnsmasq/CHANGELOG","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=0549c73b7ea6b22a3c49beb4d432f185a81efcbc","source":"cve@mitre.org"},{"url":"http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2017/dsa-3989","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171103-01-dnsmasq-en","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/101085","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/101977","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1039474","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-3430-1","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-3430-2","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-3430-3","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:2836","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:2837","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:2838","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2017:2839","tags":["Third Party 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Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/527KNN34RN2SB6MBJG7CKSEBWYE3TJEB/","source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5MMPCJOYPPL4B5RBY4U425PWG7EETDTD/","source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YXRZ2W6TV6NLUJC5NOFBSG6PZSMDTYPV/","source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/201710-27","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.arista.com/en/support/advisories-notices/security-advisories/3577-security-advisory-30","tags":["Mitigation","Third Party 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Resource"],"source":"cve@mitre.org"},{"url":"https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html","source":"cve@mitre.org"},{"url":"https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html","source":"cve@mitre.org"},{"url":"https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00003.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00004.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00005.html","tags":["Mailing List","Third Party 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Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-3430-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-3430-2","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-3430-3","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:2836","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:2837","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-14491","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}