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CVE-2007-2243
OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user…
Medium5.0EPSS 2.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
Affected products
n/a
- affected n/a
References (7)
- 20070421 OpenSSH - System Account Enumeration if S/Key is used (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 23601 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 2631 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- 34600 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- openssh-challenge-information-disclosure(33794) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20070424 OpenSSH - System Account Enumeration if S/Key is used (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- https://security.netapp.com/advisory/ntap-20191107-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2007-2243)Record last updated .