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TITLE:
GNU Screen UTF-8 Character Handling Vulnerabilities

SECUNIA ADVISORY ID:
SA22583

VERIFY ADVISORY:
http://secunia.com/advisories/22583/

CRITICAL:
Less critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
GNU Screen 4.x
http://secunia.com/product/2578/

DESCRIPTION:
Some vulnerabilities have been reported in GNU Screen, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
potentially compromise a vulnerable system.

The vulnerabilities are caused due to errors within the handling of
certain UTF-8 characters. This can be exploited to crash GNU Screen
or potentially execute arbitrary code by printing a specially crafted
string to the window.

The vulnerability is reported in versions prior to 4.0.3.

SOLUTION:
Update to version 4.0.3.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits cstone and Rich Felker

ORIGINAL ADVISORY:
http://lists.gnu.org/archive/html/screen-users/2006-10/msg00028.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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