CVE-2012-4559

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.

Category

6.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 3.82% Top 15%
Vendor Advisory debian.org Vendor Advisory mandriva.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory libssh.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=871612
http://www.debian.org/security/2012/dsa-2577 vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:175 vendor advisory
http://www.ubuntu.com/usn/USN-1640-1 vendor advisory
http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html vendor advisory
http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/80218 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html vendor advisory
http://www.openwall.com/lists/oss-security/2012/11/20/3 mailing list
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html vendor advisory
http://www.securityfocus.com/bid/56604 vdb entry
http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2012-4559?
CVE-2012-4559 has been scored as a medium severity vulnerability.
How to fix CVE-2012-4559?
To fix CVE-2012-4559, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-4559 being actively exploited in the wild?
It is possible that CVE-2012-4559 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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