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CVE-2012-4561
The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in…
Medium5.0EPSS 4.8%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an error path," which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 4.8% · top 8.1% of all CVEs (2 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
- n/a
Affected products
n/a
- affected n/a
References (13)
- DSA-2577 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- MDVSA-2012:175 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=871617 (opens in a new tab)x_refsource_MISCx_transferred
- USN-1640-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- openSUSE-SU-2013:0130 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2012:1622 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2012-18610 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- openSUSE-SU-2012:1620 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- [oss-security] 20121120 libssh 0.5.3 release fixes multiple security issues (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- libssh-multiple-dos(80220) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- FEDORA-2012-18677 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 56604 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/ (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)
Record last updated .