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Vulnerability · Published Aug 29, 2022 · Assigned by redhat

CVE-2022-0934

High 7.5

In plain English

A high-severity use-after-free in dnsmasq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)2.6%top 14.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8dnsmasq2.79-24.el8ALSA-2022:7633
AlmaLinux:9dnsmasq2.85-5.el9ALSA-2022:8070
AlmaLinux:8dnsmasq-utils2.79-24.el8ALSA-2022:7633
AlmaLinux:9dnsmasq-utils2.85-5.el9ALSA-2022:8070
Alpine:v3.20dnsmasq2.86-r1ALPINE-CVE-2022-0934
Alpine:v3.21dnsmasq2.86-r1ALPINE-CVE-2022-0934
Alpine:v3.22dnsmasq2.86-r1ALPINE-CVE-2022-0934
Alpine:v3.23dnsmasq2.86-r1ALPINE-CVE-2022-0934
Alpine:v3.24dnsmasq2.86-r1ALPINE-CVE-2022-0934
Debian:12dnsmasq2.87-1DEBIAN-CVE-2022-0934
Debian:13dnsmasq2.87-1DEBIAN-CVE-2022-0934
Debian:14dnsmasq2.87-1DEBIAN-CVE-2022-0934
Rocky Linux:8dnsmasq0:2.79-24.el8RLSA-2022:7633
Rocky Linux:9dnsmasq0:2.85-5.el9RLSA-2022:8070
Ubuntu:22.04:LTSdnsmasq2.86-1.1ubuntu0.1UBUNTU-CVE-2022-0934
Ubuntu:22.04:LTSdnsmasq2.86-1.1ubuntu0.1USN-5408-1

Affected products (as reported)

VendorProductVersions
n/a dnsmasq Not-Known

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References