CVE-2012-4559: n/a vulnerability

CVE-2012-4559: Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request fu...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:42 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2012-4559 is a set of memory-management flaws in libssh before 0.5.3. A remote attacker could crash affected software and the CVE states arbitrary code execution may be possible. Business urgency depends on whether legacy systems still ship or embed this old libssh version. Exposure is most likely on legacy Linux systems, appliances, or applications that use libssh before 0.5.3. The bundle cites Debian, Ubuntu, Fedora, openSUSE, and Mandriva advisories, but does not enumerate every downstream product embedding libssh. Treat this as a legacy exposure cleanup item with high impact potential. It is not shown as actively exploited in the provided bundle, but remote crash risk and possible code execution justify prioritizing affected exposed systems. Mitigation focus: Upgrade libssh to 0.5.3 or a vendor-fixed package.; Apply relevant Debian, Ubuntu, Fedora, openSUSE, or Mandriva security updates.; Identify applications or appliances that embed libssh independently of OS packages..

Prepared: Jun 24, 2026, 12:04 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Execution behavior lookup

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CVE-2012-4559 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 30, 2012, 22:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.redhat.com/show_bug.cgi?id=871612CVE reference · x_refsource_MISC
libssh-code-execution(80218)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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