4.3
CVSSv2

CVE-2017-14494

Published: 03/10/2017 Updated: 07/11/2023
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 5.9 | Impact Score: 3.6 | Exploitability Score: 2.2
VMScore: 435
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Vulnerability Summary

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

Vulnerability Trend

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redhat enterprise linux desktop 7.0

redhat enterprise linux workstation 7.0

redhat enterprise linux server 7.0

debian debian linux 7.1

novell leap 42.2

debian debian linux 7.0

canonical ubuntu linux 16.04

canonical ubuntu linux 14.04

canonical ubuntu linux 17.04

debian debian linux 9.0

novell leap 42.3

thekelleys dnsmasq

Vendor Advisories

Synopsis Critical: dnsmasq security update Type/Severity Security Advisory: Critical Topic An update for dnsmasq is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Critical A Common Vulnerability Scoring System (CVSS) base score, wh ...
Synopsis Critical: dnsmasq security update Type/Severity Security Advisory: Critical Topic An update for dnsmasq is now available for Red Hat Enterprise Linux 72 Extended Update Support and Red Hat Enterprise Linux 73 Extended Update SupportRed Hat Product Security has rated this update as having a secur ...
Felix Wilhelm, Fermin J Serna, Gabriel Campana, Kevin Hamacher, Ron Bowes and Gynvael Coldwind of the Google Security Team discovered several vulnerabilities in dnsmasq, a small caching DNS proxy and DHCP/TFTP server, which may result in denial of service, information leak or the execution of arbitrary code For the oldstable distribution (jessie) ...
Several security issues were fixed in Dnsmasq ...
USN-3430-2 introduced regression in Dnsmasq ...
Several security issues were fixed in Dnsmasq ...
Information leak in the DHCPv6 relay codeAn information leak was found in dnsmasq in the DHCPv6 relay code An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data (CVE-2017-14494) Memory exhaustion vulnerability in the EDNS0 codeA memory ...
A memory exhaustion flaw was found in dnsmasq in the EDNS0 code An attacker could send crafted DNS packets which would trigger memory allocations which would never be freed, leading to unbounded memory consumption and eventually a crash This issue only affected configurations using one of the options: add-mac, add-cpe-id, or add-subnet (CVE-2017 ...
An information leak was found in dnsmasq in the DHCPv6 relay code An attacker on the local network could send crafted DHCPv6 packets to dnsmasq causing it to forward the contents of process memory, potentially leaking sensitive data ...

Exploits

''' Sources: rawgithubusercontentcom/google/security-research-pocs/master/vulnerabilities/dnsmasq/CVE-2017-14494py securitygoogleblogcom/2017/10/behind-masq-yet-more-dns-and-dhcphtml Sadly, there are no easy docker setup instructions available Setup a simple network with dnsmasq as dhcpv6 server Run any dhcpv6 client on th ...
Dnsmasq versions prior to 278 suffer from an information leak vulnerability ...