TLS Padding Oracle in Cisco Adaptive Security Appliance (ASA) - CVE-2017-12373
Published: January 3, 2024
Vulnerability identifier: #VU84952
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2017-12373
CWE-ID: CWE-310
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Adaptive Security Appliance (ASA)
Cisco Adaptive Security Appliance (ASA)
Detailed vulnerability description
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).
How to mitigate CVE-2017-12373
Install updates from vendor's website.