SB2019061131 - Fedora 30 update for dbus

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2019061131

SB2019061131 - Fedora 30 update for dbus

Published: June 11, 2019 Updated: April 25, 2025

Security Bulletin ID SB2019061131
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Authentication (CVE-ID: CVE-2019-12749)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a an attacker to bypass authentication process.

The vulnerability exists due to an error when handling symlinks within the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. A malicious client with access to to its own home directory can manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write into unintended locations.

Successful exploitation of the vulnerability may allow an attacker to bypass DBUS_COOKIE_SHA1 authentication mechanis.


Remediation

Install update from vendor's website.

References