CVE-2017-14494

MEDIUM

dnsmasq <2.78 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-14494. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a buffer overflow in dnsmasq's DHCPv6 relay functionality (CVE-2017-14494) by crafting a malicious DHCPv6 packet with an oversized option to leak memory contents. It sends a specially crafted packet to a target dnsmasq server and dumps the response to a file.

Description

dnsmasq before 2.78, when configured as a relay, allows remote attackers to obtain sensitive memory information via vectors involving handling DHCPv6 forwarded requests.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · pythondosmultiple
https://www.exploit-db.com/exploits/42944

This PoC exploits a buffer overflow in dnsmasq's DHCPv6 relay functionality (CVE-2017-14494) by crafting a malicious DHCPv6 packet with an oversized option to leak memory contents. It sends a specially crafted packet to a target dnsmasq server and dumps the response to a file.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: dnsmasq (versions before 2.78)
No auth needed
Prerequisites: Network access to the target dnsmasq server · DHCPv6 relay functionality enabled on the target · Server identifier (DUID) from DHCPv6 packets
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (20)

Core 20
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, 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
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
Patch, Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2017:2837
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42944/
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 5.9
EPSS 0.6755
EPSS Percentile 99.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-200
Status published
Products (12)
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
novell/leap 42.2
novell/leap 42.3
redhat/enterprise_linux_desktop 7.0
redhat/enterprise_linux_server 7.0
... and 2 more
Published Oct 03, 2017
Tracked Since Feb 18, 2026