CVE-2017-14496

HIGH

dnsmasq <2.78 - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-14496. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit triggers a heap-based buffer overflow in dnsmasq via a crafted DNS packet, leading to a denial-of-service (DoS) condition. The vulnerability arises from incorrect handling of EDNS0 options when specific configuration flags are enabled.

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · pythondosmultiple
https://www.exploit-db.com/exploits/42946

This exploit triggers a heap-based buffer overflow in dnsmasq via a crafted DNS packet, leading to a denial-of-service (DoS) condition. The vulnerability arises from incorrect handling of EDNS0 options when specific configuration flags are enabled.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: dnsmasq (versions with --add-mac, --add-cpe-id, or --add-subnet enabled)
No auth needed
Prerequisites: dnsmasq configured with --add-mac, --add-cpe-id, or --add-subnet · network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (22)

Core 22
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039474
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2017/dsa-3989
Issue Tracking, Third Party Advisory x_refsource_confirm
https://access.redhat.com/security/vulnerabilities/3199382
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/101085
Third Party Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-3430-1
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/101977
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/973527
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201710-27
Third Party Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-3430-2
Third Party Advisory x_refsource_confirm
https://source.android.com/security/bulletin/2017-10-01
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42946/
Patch, Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:2836
Vendor Advisory x_refsource_confirm
http://nvidia.custhelp.com/app/answers/detail/a_id/4561
Release Notes, Vendor Advisory x_refsource_confirm
http://thekelleys.org.uk/dnsmasq/CHANGELOG
Issue Tracking, Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html

Scores

CVSS v3 7.5
EPSS 0.6635
EPSS Percentile 99.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-191
Status published
Products (21)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 17.04
debian/debian_linux 7.0
debian/debian_linux 7.1
debian/debian_linux 9.0
google/android 4.4.4
google/android 5.0.2
google/android 5.1.1
google/android 6.0
... and 11 more
Published Oct 03, 2017
Tracked Since Feb 18, 2026