SB2019052801 - OpenSUSE Linux update for systemd

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Main Vulnerability Database SB2019052801

SB2019052801 - OpenSUSE Linux update for systemd

Published: May 28, 2019

Security Bulletin ID SB2019052801
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Symlink attack (CVE-ID: CVE-2018-6954)

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

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


The vulnerability allows a local attacker to launch symlink attack on the target system.

The weakness exists in the systemd-tmpfiles feature due to improper handling of symlinks in nonterminal path components. A local attacker can gain unauthorized access to arbitrary files.

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-3842)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to pam_systemd creates a user session using environmental parameters. A local user can spoof an active session and gain additional PolicyKit privileges.


3) Input validation error (CVE-ID: CVE-2019-6454)

CWE-ID: CWE-20 - Improper input validation

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


The vulnerability allows a local unauthenticated attacker to cause DoS condition on the target system.

The weakness exists due to incorrect handling of certain D-Bus messages. A local attacker can supply specially crafted D-Bus messages to crash the init process, resulting in a system denial-of-service (kernel panic).

Remediation

Install update from vendor's website.

References