SB20230820235 - Fedora 38 update for tang
Published: August 20, 2023
Security Bulletin ID
SB20230820235
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2023-1672)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a race condition in the Tang server functionality for key generation and key rotation, which results in a small time window where Tang server private keys become readable by any other process on the same host. The files are initially created with world readable permissions (0644), and only subsequently have more restrictive permissions applied (0440). A local user can exploit the race and obtain Tang private keys.
Remediation
Install update from vendor's website.