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Mandriva Linux Security Advisory 2013-045

Mandriva Linux Security Advisory 2013-045
Posted Apr 5, 2013
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2013-045 - Multiple double free flaws, buffer overflow flaws, invalid free flaws, and improper overflow checks in libssh before 0.5.3 could enable a denial of service attack against libssh clients, or possibly arbitrary code execution. Yong Chuan Koh discovered that libssh incorrectly handled certain negotiation requests. A remote attacker could use this to cause libssh to crash, resulting in a denial of service.

tags | advisory, remote, denial of service, overflow, arbitrary, code execution
systems | linux, mandriva
advisories | CVE-2012-4559, CVE-2012-4560, CVE-2012-4561, CVE-2012-4562, CVE-2013-0176
SHA-256 | b001afcc00872bffb479840552f9f98c8e4a053611dc49aa61aa6b801599a2cb

Mandriva Linux Security Advisory 2013-045

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

_______________________________________________________________________

Mandriva Linux Security Advisory MDVSA-2013:045
http://www.mandriva.com/en/support/security/
_______________________________________________________________________

Package : libssh
Date : April 5, 2013
Affected: Business Server 1.0
_______________________________________________________________________

Problem Description:

Updated libssh packages fix security vulnerabilities:

Multiple double free flaws, buffer overflow flaws, invalid free
flaws, and improper overflow checks in libssh before 0.5.3 could
enable a denial of service attack against libssh clients, or possibly
arbitrary code execution (CVE-2012-4559, CVE-2012-4560, CVE-2012-4561
and CVE-2012-4562).

Yong Chuan Koh discovered that libssh incorrectly handled certain
negotiation requests. A remote attacker could use this to cause libssh
to crash, resulting in a denial of service (CVE-2013-0176).
_______________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4559
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4560
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4561
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4562
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0176
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0344
https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0033
_______________________________________________________________________

Updated Packages:

Mandriva Business Server 1/X86_64:
75e5b89f0a5d0eda3bbb0f2c97568cc8 mbs1/x86_64/lib64ssh4-0.5.2-2.1.mbs1.x86_64.rpm
4dc1a2ba2f6148f774fcddef1d32b7b5 mbs1/x86_64/lib64ssh-devel-0.5.2-2.1.mbs1.x86_64.rpm
519a8c2a9c8bab7c31537cdef43c2cfd mbs1/SRPMS/libssh-0.5.2-2.1.mbs1.src.rpm
_______________________________________________________________________

To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/en/support/security/advisories/

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
_______________________________________________________________________

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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