PT-2017-4231 · Dnsmasq+1 · Dnsmasq+1

Arne Woerner + 3 · Published 2017-09-07 · Updated 2018-05-11 · CVE-2017-13704

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions dnsmasq versions prior to 2.78

Description The issue is related to insufficient size checking of DNS packets in the memset() function of the dnsmasq DNS server. This can be exploited by a remote attacker to cause a denial of service by sending specially crafted requests to port 53/udp. The exploitation leads to dnsmasq crashing due to an incorrect size parameter in a memset call, resulting in an attempt to write a large number of zeros.

Recommendations For versions prior to 2.78, update to version 2.78 or later to resolve the issue. As a temporary workaround, consider restricting access to the DNS server to minimize the risk of exploitation.

Exploit

Fix

RCE

Integer Overflow

Weakness Enumeration

CWE-20

CWE-190

Related Identifiers

ALT-PU-2017-2387

BDU:2022-07423

CVE-2017-13704

MGASA-2017-0364

MGASA-2017-0367

Affected Products

Alt Linux

Dnsmasq

References · 65

• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14491.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14494.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14492.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14495.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14493.py · Exploit
• 🔥 https://github.com/google/security-research-pocs/blob/master/vulnerabilities/dnsmasq/CVE-2017-14496.py · Exploit
• 🔥 https://github.com/pupiles/bof-dnsmasq-cve-2017-14493 · Exploit
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/4TK6DWC53WSU6633EVZL7H4PCWBYHMHK · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-07423 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-13704 · Vendor Advisory
• https://errata.altlinux.org/ALT-PU-2017-2387 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14492 · Security Note
• https://bdu.fstec.ru/vul/2017-02359 · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2017-13704 · Vendor Advisory
• https://bdu.fstec.ru/vul/2017-02357 · Security Note