SB2020110426 - Red Hat Enterprise Linux 8 update for the freeradius:3.0 module
Published: November 4, 2020
Security Bulletin ID
SB2020110426
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2019-17185)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the EAP-pwd module uses a global OpenSSL BN_CTX instance to handle all
handshakes. This mean multiple threads use the same BN_CTX instance
concurrently, resulting in crashes when concurrent EAP-pwd handshakes
are initiated. A remote attacker can perform multiple login attempts and crash the daemon.
Remediation
Install update from vendor's website.