CVE-2012-4561
First published: Tue Oct 30 2012(Updated: )
Florian Weimer of the Red Hat Product Security Team reported the existence of several unitialized heap allocations in the following functions: keys.c:publickey_make_dss() (key) keys.c:publickey_make_rsa() (key) keys.c:signature_from_string() (sign) keys.c:ssh_do_sign() (sign) keys.c:ssh_sign_session_id() (sign) This could lead to freeing an invalid pointer on an error path, which could lead to a crash in the process using libssh.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libssh | <0.5.3 | 0.5.3 |
| libssh | <=0.5.2 | |
| libssh | =0.4.7 | |
| libssh | =0.4.8 | |
| libssh | =0.5.0 | |
| libssh | =0.5.0-rc1 | |
| libssh | =0.5.1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- 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/
- 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=871617
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80220
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644662&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644662&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644663&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644663&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644998&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644998&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644999&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=644999&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=878521
Frequently Asked Questions
What is the severity of CVE-2012-4561?
CVE-2012-4561 is classified as a moderate severity vulnerability due to potential impacts from uninitialized heap allocations.
How do I fix CVE-2012-4561?
To fix CVE-2012-4561, update libssh to version 0.5.3 or later.
What software is affected by CVE-2012-4561?
CVE-2012-4561 affects versions of libssh up to 0.5.2 and specific versions like 0.4.7, 0.4.8, 0.5.0, and 0.5.1.
What types of functions are involved in CVE-2012-4561?
CVE-2012-4561 involves uninitialized heap allocations in various public key and signing functions within libssh.
Who reported CVE-2012-4561?
CVE-2012-4561 was reported by Florian Weimer of the Red Hat Product Security Team.
- agent/type
- agent/first-publish-date
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2012-4561
- agent/software-canonical-lookup
- agent/severity
- agent/references
- agent/author
- agent/last-modified-date
- agent/description
- agent/event
- agent/trending
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/redhat
- vendor/libssh
- canonical/libssh
- version/libssh/0.5.2
- version/libssh/0.4.7
- version/libssh/0.4.8
- version/libssh/0.5.0
- version/libssh/0.5.0-rc1
- version/libssh/0.5.1