CVE-2012-4559
Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2)...
CVE-2012-4559 is a medium vulnerability (CVSS 6.8) in Libssh, published November 30, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.18%, the 92nd percentile. Fixed in libssh 0.5.3-1.
- Severity
- 6.8 MediumCVSS 2.0, NVD
- Exploit chance
- 5.18%EPSS, 92nd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0.5.3-1libssh +4 more
Description
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.
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libsshDebian:12 | before 0.5.3-1 | 0.5.3-1 |
libsshDebian:13 | before 0.5.3-1 | 0.5.3-1 |
libsshDebian:14 | before 0.5.3-1 | 0.5.3-1 |
libsshDebian:6.0 From an advisory covering 4 CVEs | before 0.4.5-3+squeeze1, plus listed versions 0.4.5-3 | 0.4.5-3+squeeze1 |
libsshopenSUSE:Tumbleweed From an advisory covering 7 CVEs | before 0.7.2-2.1 | 0.7.2-2.1 |
What each source reports
NVD Score used
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.
- Record
CVE-2012-4559- CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2012-4559- Updated
- 2026-11-02
EUVDEUVD-2012-4487No score
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.
- Record
EUVD-2012-4487- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-px93-6r58-rr4jNo score
Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2)...
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.
- Record
GHSA-px93-6r58-rr4j- Updated
- 2026-11-02
OSVNo score
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.
- Record
CVE-2012-4559- Updated
- 2026-11-02
OSVDEBIAN-CVE-2012-4559No score
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.
- Record
DEBIAN-CVE-2012-4559- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10036-1No 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
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
bugzilla.redhat.com/show_bug.cgi?id=871612
debian.org/security/2012/dsa-2577
mandriva.com/security/advisories?name=MDVSA-2012:175
ubuntu.com/usn/USN-1640-1
lists.opensuse.org/opensuse-updates/2013-01/msg00021.html
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exchange.xforce.ibmcloud.com/vulnerabilities/80218
lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
openwall.com/lists/oss-security/2012/11/20/3
securityfocus.com/bid/56604
libssh.org/2012/11/20/libssh-0-5-3-security-release
nvd.nist.gov/vuln/detail/CVE-2012-4559
github.com/advisories/GHSA-px93-6r58-rr4j
security-tracker.debian.org/tracker/CVE-2012-4559
suse.com/security/cve/CVE-2012-4559