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CVE-2007-2243

MEDIUM · CVSS 5.0EPSS 2.4%EU EUVD

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.

Key facts

CVSS score
5.0 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE)
CWE-287
EPSS score
2.4% (84th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2007-2238)
Published
April 25, 2007
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2007-2238 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
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  • openbsd / openssh
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  • openbsd / openssh
  • openbsd / openssh
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  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh
  • openbsd / openssh

and 12 more…

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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