CVE-2017-14496
Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service via a crafted DNS request.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 68.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service via a crafted DNS request.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 68.42% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 2 October 2017
- CISA KEV
- Not listed
- Weakness
- CWE-191
- Affected
- canonical/ubuntu linux · debian/debian linux · google/android · novell/leap · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation · thekelleys/dnsmasq
- Source
- cve@mitre.org
EPSS moved from 63.0% on 21 September 2026 to 68.4% on 27 October 2026, peaking at 69.4% on 21 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/4561
- http://thekelleys.org.uk/dnsmasq/CHANGELOGRelease Notes, Vendor Advisory
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- 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.securityfocus.com/bid/101977
- 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/security/vulnerabilities/3199382Issue Tracking, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
- https://security.gentoo.org/glsa/201710-27
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.htmlThird Party Advisory
- https://source.android.com/security/bulletin/2017-10-01Third Party Advisory
- https://www.exploit-db.com/exploits/42946/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_Dnsmasq
- 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/4561
- http://thekelleys.org.uk/dnsmasq/CHANGELOGRelease Notes, Vendor Advisory
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- 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.securityfocus.com/bid/101977
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.