TITLE:
osh Environment Variable Substitution Vulnerability

SECUNIA ADVISORY ID:
SA17527

VERIFY ADVISORY:
https://secunia.com/advisories/17527/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
osh 1.x
https://secunia.com/product/1750/

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

The vulnerability is caused due to an error in "main.c" when handling
environment variable substitutions. This can be exploited to inject
arbitrary environment variables (e.g. LD_PRELOAD) to cause malicious
shared libraries to be loaded by osh.

Successful exploitation allows arbitrary code execution with root
privileges.

The vulnerability has been reported in version 1.7-14. Prior versions
may also be affected.

Note: An exploit for this vulnerability is publicly available.

SOLUTION:
This product is being maintained as a Debian package and patches are
available from Debian.

The vulnerability has been fixed in version 1.7-15.

PROVIDED AND/OR DISCOVERED BY:
Solar Eclipse

ORIGINAL ADVISORY:
Debian:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=338312

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