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Secunia Network Software Inspector 2.0 (NSI) - Public Beta

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TITLE:
MirBSD Korn Shell TTY Attachment Privilege Escalation

SECUNIA ADVISORY ID:
SA29803

VERIFY ADVISORY:
http://secunia.com/advisories/29803/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
MirBSD Korn Shell 3.x
http://secunia.com/product/18328/

DESCRIPTION:
A vulnerability has been reported in MirBSD Korn Shell, which can be
exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to an error when attaching to a TTY
via the "-T" command line switch. This can be exploited to execute
arbitrary commands with the privileges of the user running mksh via
characters previously written to the attached virtual console. 

The vulnerability is reported in versions prior to R33d.

SOLUTION:
Update to version R33d.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.mirbsd.org/mksh.htm#clog

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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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