SB2020121720 - Raccoon attack against TLS implementation in F5 BIG-IP
Published: December 17, 2020
Security Bulletin ID
SB2020121720
Severity
Medium
Patch available
NO
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Raccoon attack (CVE-ID: CVE-2020-1968)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a timing flaw in the TLS specification. A remote attacker can compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite and eavesdrop on all encrypted communications sent over that TLS connection.
Note: The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections.
Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.