CVE-2012-4559
Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, (3) ssh_userauth_pubkey function in auth.c, (4) sftp_parse_attr_3 function in sftp.c, and (5) try_publickey_from_file function in keyfiles.c in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-399
- EPSS score
- 5.2% (92th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2012-4487)
- Published
- November 30, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2012-4487 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- libssh / libssh
- libssh / libssh
- libssh / libssh
- libssh / libssh
- libssh / libssh
- libssh / libssh
References
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html
- http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html
- http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html
- http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html
- http://www.debian.org/security/2012/dsa-2577
- http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/(Vendor Advisory)
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:175
- http://www.openwall.com/lists/oss-security/2012/11/20/3
- http://www.securityfocus.com/bid/56604
- http://www.ubuntu.com/usn/USN-1640-1
- https://bugzilla.redhat.com/show_bug.cgi?id=871612
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80218
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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