SB2018042202 - Gentoo update for tenshi
Published: April 22, 2018
Security Bulletin ID
SB2018042202
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Privilege dropping (CVE-ID: CVE-2017-11746)
CWE-ID: CWE-271 - Privilege Dropping / Lowering Errors
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 attacker to gain elevated privileges on the target system.
The weakness exists due to creating a tenshi.pid file after dropping privileges to a non-root account. A local attacker can kill arbitrary processes by leveraging access to this non-root account for tenshi.pid modification before a root script executes a "kill `cat /pathname/tenshi.pid`" command.
Remediation
Install update from vendor's website.