CVE-2017-14493
Stack-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 DHCPv6 request.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 85.2%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
Stack-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 DHCPv6 request.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 85.24% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 2 October 2017
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- canonical/ubuntu linux · debian/debian linux · opensuse/leap · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation · thekelleys/dnsmasq
- Source
- cve@mitre.org
EPSS moved from 78.9% on 21 September 2026 to 85.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.htmlIssue Tracking, Mailing List, Third Party Advisory
- http://nvidia.custhelp.com/app/answers/detail/a_id/4561Third Party Advisory
- http://thekelleys.org.uk/dnsmasq/CHANGELOGRelease Notes, Vendor Advisory
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=3d4ff1ba8419546490b464418223132529514033
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
- http://www.debian.org/security/2017/dsa-3989Third Party Advisory
- http://www.securityfocus.com/bid/101085Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039474Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3430-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3430-2Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2836Patch, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2837Patch, Third Party Advisory
- https://access.redhat.com/security/vulnerabilities/3199382Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/201710-27Third Party Advisory
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.htmlThird Party Advisory
- https://www.exploit-db.com/exploits/42943/Exploit, Third Party Advisory, VDB Entry
- https://www.kb.cert.org/vuls/id/973527Third Party Advisory, US Government Resource
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
- https://www.synology.com/support/security/Synology_SA_17_59_DnsmasqThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.htmlIssue Tracking, Mailing List, Third Party Advisory
- http://nvidia.custhelp.com/app/answers/detail/a_id/4561Third Party Advisory
- http://thekelleys.org.uk/dnsmasq/CHANGELOGRelease Notes, Vendor Advisory
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=3d4ff1ba8419546490b464418223132529514033
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
- http://www.debian.org/security/2017/dsa-3989Third Party Advisory
- http://www.securityfocus.com/bid/101085Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039474Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3430-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3430-2Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.