CVE-2012-4561

Publication date 20 November 2012

Last updated 24 July 2024

The (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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libssh	12.10 quantal	Fixed 0.5.2-1ubuntu0.12.10.1
	12.04 LTS precise	Fixed 0.5.2-1ubuntu0.12.04.1
	11.10 oneiric	Fixed 0.5.2-1ubuntu0.11.10.1
	10.04 LTS lucid	Fixed 0.4.2-1ubuntu1.1
	8.04 LTS hardy	Ignored end of life

How can I get the fixes?
What do statuses mean?
Patch details

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libssh	Upstream: ?h=v0-5 Upstream: ?h=v0-5

References

MITRE
NVD
Launchpad
Debian

Related Ubuntu Security Notices (USN)

USN-1640-1
libssh vulnerabilities
26 November 2012

Other references

http://www.openwall.com/lists/oss-security/2012/11/20
https://www.cve.org/CVERecord?id=CVE-2012-4561