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
Published Nov 30, 2012
5.0
MEDIUMCVSS 2.0
EPSS 4.75%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.75% (0.04750) | 91.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.75% (0.04750) | 90.69th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.71% (0.03707) | 86.86th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.12% (0.05120) | 82.69th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.71% (0.03707) | 87.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 10.43% (0.10434) | 95.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 10.43% (0.10434) | 94.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
No CWE recorded.
References (13)
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html vendor-advisoryx_refsource_SUSE
- http://www.debian.org/security/2012/dsa-2577 vendor-advisoryx_refsource_DEBIAN
- http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/ x_refsource_CONFIRMVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:175 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2012/11/20/3 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/56604 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1640-1 vendor-advisoryx_refsource_UBUNTU
- https://bugzilla.redhat.com/show_bug.cgi?id=871617 x_refsource_MISC
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80220 vdb-entryx_refsource_XF
Change history (0)
No recorded changes yet.