SB2020103048 - Fedora 33 update for trousers
Published: October 30, 2020 Updated: April 25, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Improper Privilege Management (CVE-ID: CVE-2020-24330)
CWE-ID: CWE-269 - Improper Privilege Management
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.
The vulnerability exists due to the tcsd daemon is started with root privileges instead of tss user and fails to drop them after successful start. A local user can abuse such behavior and escalate privileges on the system.
2) Improper Privilege Management (CVE-ID: CVE-2020-24331)
CWE-ID: CWE-269 - Improper Privilege Management
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 improper privilege management if the tcsd daemon is started with root privileges. A local user can get read and write access to the /etc/tcsd.conf file and escalate privileges on the system.
3) Link following (CVE-ID: CVE-2020-24332)
CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to creation of the system.data file is prone to symlink attacks if the tcsd daemon is started with root privileges. A local user can create or corrupt existing files, which could possibly lead to a DoS attack
Remediation
Install update from vendor's website.