Auth bypass in Openbsd Openssh
CVE-2007-2243
OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.
Vulnerability class: Broken Authentication
EPSS: 0.025 (82.9th percentile) — read the EPSS interpretation.
Affected products
- Openbsd Openssh — versions 1.2, 1.2.1, 1.2.2
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (mailing-list, x_refsource_FULLDISC)
- cve@mitre.org (vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_SREASON, third-party-advisory)
- cve@mitre.org (x_refsource_OSVDB, vdb-entry)
- cve@mitre.org (vdb-entry, x_refsource_XF)
- cve@mitre.org (mailing-list, x_refsource_FULLDISC)
- cve@mitre.org (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2007-2243?
- CVE-2007-2243 is a vulnerability in Openbsd Openssh, classified under Improper Authentication. Published 2007-04-25.
- Is CVE-2007-2243 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.