DSA-2577-1 libssh -- several vulnerabilities

Debian Security Advisory

DSA-2577-1 libssh -- several vulnerabilities

Date Reported:

01 Dec 2012

Affected Packages:

libssh

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2012-4559, CVE-2012-4561, CVE-2012-4562, CVE-2012-6063.

More information:

Multiple vulnerabilities were discovered in libssh by Florian Weimer and Xi Wang:

• CVE-2012-4559: multiple double free() flaws

• CVE-2012-4561: multiple invalid free() flaws

• CVE-2012-4562: multiple improper overflow checks

Those could lead to a denial of service by making an SSH client linked to libssh crash, and maybe even arbitrary code execution.

For the stable distribution (squeeze), these problems have been fixed in version 0.4.5-3+squeeze1.

For the testing distribution (wheezy), these problems have been fixed in version 0.5.3-1.

For the unstable distribution (sid), these problems have been fixed in version 0.5.3-1.

We recommend that you upgrade your libssh packages.