SB2017121538 - TLS Padding Oracle in Cisco ASA
Published: December 15, 2017 Updated: January 3, 2024
Security Bulletin ID
SB2017121538
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) TLS Padding Oracle (CVE-ID: CVE-2017-12373)
The vulnerability allows a remote attacker to decrypt TLS traffic.
The vulnerability exists due to an error in TLS implementation. A remote attacker with ability to establish a large number of TLS connections with the target server can conduct an adaptive-chosen ciphertext attack against RSA cipher and gain access to sensitive information.
The attack is known as "ROBOT" (Return Of Bleichenbacher's Oracle Threat).
Remediation
Install update from vendor's website.