VULNERABILITY INTELLIGENCE

CVE-2017-12373

CVSS score5.9 MEDIUM

EPSS probability12.80%

CISA KEVNot currently listed

Published2017-12-15

Last modified2026-06-17

CVSS vectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

A vulnerability in the TLS protocol implementation of legacy Cisco ASA 5500 Series (ASA 5505, 5510, 5520, 5540, and 5550) devices could allow an unauthenticated, remote attacker to access sensitive information, aka a Return of Bleichenbacher's Oracle Threat (ROBOT) attack. An attacker could iteratively query a server running a vulnerable TLS stack implementation to perform cryptanalytic operations that may allow decryption of previously captured TLS sessions. Cisco Bug IDs: CSCvg97652.

Weakness classification

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-203: Observable Discrepancy

Primary references

psirt@cisco.com — Third Party Advisory, VDB Entry
psirt@cisco.com — Issue Tracking, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Mitigation, Vendor Advisory