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Sicherheit: Mehrere Probleme in LibVNCServer
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in LibVNCServer
ID: MDVSA-2015:146
Distribution: Mandriva
Plattformen: Mandriva Business Server 2.0
Datum: So, 29. März 2015, 14:15
Referenzen: http://advisories.mageia.org/MGASA-2014-0356.html
http://advisories.mageia.org/MGASA-2014-0397.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4607
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6051
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6052
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6053
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6054
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6055

Originalnachricht

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_______________________________________________________________________

Mandriva Linux Security Advisory MDVSA-2015:146
http://www.mandriva.com/en/support/security/
_______________________________________________________________________

Package : libvncserver
Date : March 29, 2015
Affected: Business Server 2.0
_______________________________________________________________________

Problem Description:

Updated libvncserver packages fix security vulnerabilities:

An integer overflow in liblzo before 2.07 allows attackers to cause
a denial of service or possibly code execution in applications using
performing LZO decompression on a compressed payload from the attacker
(CVE-2014-4607).

The libvncserver library is built with a bundled copy of minilzo,
which is a part of liblzo containing the vulnerable code.

A malicious VNC server can trigger incorrect memory management handling
by advertising a large screen size parameter to the VNC client. This
would result in multiple memory corruptions and could allow remote
code execution on the VNC client (CVE-2014-6051, CVE-2014-6052).

A malicious VNC client can trigger multiple DoS conditions on the VNC
server by advertising a large screen size, ClientCutText message length
and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054).

A malicious VNC client can trigger multiple stack-based buffer
overflows by passing a long file and directory names and/or
attributes (FileTime) when using the file transfer message feature
(CVE-2014-6055).
_______________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4607
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6051
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6052
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6053
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6054
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6055
http://advisories.mageia.org/MGASA-2014-0356.html
http://advisories.mageia.org/MGASA-2014-0397.html
_______________________________________________________________________

Updated Packages:

Mandriva Business Server 2/X86_64:
03972a91ec4c545d7adb31a70052b1da
mbs2/x86_64/lib64vncserver0-0.9.9-4.1.mbs2.x86_64.rpm
1fa18e6e4fab02a75801ce5e1807ac48
mbs2/x86_64/lib64vncserver-devel-0.9.9-4.1.mbs2.x86_64.rpm
5a483661e96bc38566760b28f5c3a8f1
mbs2/x86_64/linuxvnc-0.9.9-4.1.mbs2.x86_64.rpm
e65eba74f16605cbe40b899ef3ff62af
mbs2/SRPMS/libvncserver-0.9.9-4.1.mbs2.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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_______________________________________________________
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Go to http://store.mandriva.com
_______________________________________________________


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