CVE-2012-4561

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Summary

CVECVE-2012-4561
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2012-11-30 22:55:01 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe (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.

Risk And Classification

Primary CVSS: v2.0 5 from [email protected]

AV:N/AC:L/Au:N/C:N/I:N/A:P

Problem Types: NVD-CWE-noinfo | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Libssh Libssh 0.4.7 All All All
Application Libssh Libssh 0.4.8 All All All
Application Libssh Libssh 0.5.0 All All All
Application Libssh Libssh 0.5.0 rc1 All All
Application Libssh Libssh 0.5.1 All All All
Application Libssh Libssh All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
871617 – (CVE-2012-4561) CVE-2012-4561 libssh: multiple invalid free() flaws af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
oss-security - libssh 0.5.3 release fixes multiple security issues af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
USN-1640-1: libssh vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
libssh Multiple Buffer Overflow and Denial of Service Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
libssh 0.5.3 (SECURITY RELEASE) at libssh - The SSH Library! af854a3a-2127-422b-91ae-364da2661108 www.libssh.org Vendor Advisory
IBM X-Force Exchange af854a3a-2127-422b-91ae-364da2661108 exchange.xforce.ibmcloud.com
[SECURITY] Fedora 17 Update: libssh-0.5.3-1.fc17 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 18 Update: libssh-0.5.3-1.fc18 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
openSUSE-SU-2012:1622-1: moderate: update for libssh af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Support / Security / Advisories / / MDVSA-2012:175 | Mandriva af854a3a-2127-422b-91ae-364da2661108 www.mandriva.com
Debian -- Security Information -- DSA-2577-1 libssh af854a3a-2127-422b-91ae-364da2661108 www.debian.org
openSUSE-SU-2013:0130-1: moderate: update for libssh af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
[security-announce] openSUSE-SU-2012:1620-1: important: update for libss af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
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