CVE-2020-12049

Publication date 8 June 2020

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Description

An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

Status

Package Ubuntu Release Status
dbus 20.04 LTS focal
Fixed 1.12.16-2ubuntu2.1
19.10 eoan
Fixed 1.12.14-1ubuntu2.1
18.04 LTS bionic
Fixed 1.12.2-1ubuntu1.2
16.04 LTS xenial
Fixed 1.10.6-1ubuntu3.6
14.04 LTS trusty
Fixed 1.6.18-0ubuntu4.5+esm2

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
dbus

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references