SB2021060747 - Fedora 34 update for ntpsec
Published: June 7, 2021
Security Bulletin ID
SB2021060747
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2021-22212)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to improper input validation when parsing keys generated by ntpkeygen. If the key contains a string with with '#' characters, the ntpd then either pads, shortens the key, or fails to load these keys entirely, which can result in possibility to launch MITM attacks between ntp clients and ntp servers.
Remediation
Install update from vendor's website.