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Vulnerability · Published Feb 15, 2021 · Assigned by redhat

CVE-2020-35512

High 7.8

In plain English

A high-severity security flaw in D-Bus Development branch. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.3%top 73.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12dbus1.12.20-1DEBIAN-CVE-2020-35512
Debian:13dbus1.12.20-1DEBIAN-CVE-2020-35512
Debian:14dbus1.12.20-1DEBIAN-CVE-2020-35512

Affected products (as reported)

VendorProductVersions
n/a D-Bus Development branch <= 1.13.16 (Fixed: >= 1.13.18)
n/a dbus-1.12.x stable branch <= 1.12.18 (Fixed: >= 1.12.20)
n/a dbus-1.10.x and older branches (EOL) <= 1.10.30 (Fixed: 1.10.32)

References