CVE-2018-15473
MEDIUMEPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Description
OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
OpenSSH 2.3 < 7.7 - Username Enumeration
by Justin Gardner · Aug 21, 2018
OpenSSH < 7.7 - User Enumeration (2)
by Leap Security · Dec 4, 2018
OpenSSH 2.3 < 7.7 - Username Enumeration (PoC)
by Matthew Daley · Aug 16, 2018
Frequently Asked Questions
Is CVE-2018-15473 in your stack?
O3 detects CVE-2018-15473 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.