CVE-2012-4561
The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign,...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2012-4561- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2012-4561- Updated
- 2026-11-02
EUVDEUVD-2012-4489 No score
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.
- Record
EUVD-2012-4489- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m2v7-9rhw-324g No score
The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign,...
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.
- Record
GHSA-m2v7-9rhw-324g- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2012-4561- Updated
- 2026-11-02
OSVDEBIAN-CVE-2012-4561 No score
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.
- Record
DEBIAN-CVE-2012-4561- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10036-1 No score
libssh-devel-0.7.2-2.1 on GA media
These are all security issues fixed in the libssh-devel-0.7.2-2.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10036-1- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2012-4561 is a medium vulnerability (CVSS 5.0) in Libssh, published November 30, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.75%, the 91st percentile. Fixed in libssh 0.5.3-1.
References
debian.org/security/2012/dsa-2577
mandriva.com/security/advisories?name=MDVSA-2012:175
bugzilla.redhat.com/show_bug.cgi?id=871617
ubuntu.com/usn/USN-1640-1
lists.opensuse.org/opensuse-updates/2013-01/msg00021.html
Show 17 moreShow less
lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
openwall.com/lists/oss-security/2012/11/20/3
exchange.xforce.ibmcloud.com/vulnerabilities/80220
securityfocus.com/bid/56604
libssh.org/2012/11/20/libssh-0-5-3-security-release
nvd.nist.gov/vuln/detail/CVE-2012-4561
github.com/advisories/GHSA-m2v7-9rhw-324g
security-tracker.debian.org/tracker/CVE-2012-4561
suse.com/security/cve/CVE-2012-4559