Mike Neuman OSH Environment Variable Buffer Overflow Vulnerability

BID:15370

Info

Mike Neuman OSH Environment Variable Buffer Overflow Vulnerability

Bugtraq ID: 15370
Class: Boundary Condition Error
CVE: CVE-2005-3346
Remote: No
Local: Yes
Published: Nov 09 2005 12:00AM
Updated: Apr 26 2006 08:46PM
Credit: The discovery of this issue is credited to Solar Eclipse.
Vulnerable: osh osh 1.7
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
Debian Linux 3.0 sparc
Debian Linux 3.0 s/390
Debian Linux 3.0 ppc
Debian Linux 3.0 mipsel
Debian Linux 3.0 mips
Debian Linux 3.0 m68k
Debian Linux 3.0 ia-64
Debian Linux 3.0 ia-32
Debian Linux 3.0 hppa
Debian Linux 3.0 arm
Debian Linux 3.0 alpha
Debian Linux 3.0
Not Vulnerable:

Discussion

Mike Neuman OSH Environment Variable Buffer Overflow Vulnerability

The 'osh' utility is susceptible to a buffer-overflow vulnerability when processing environment variables. This issue is due to a flaw in the application that results in overwriting adjacent environment variables with user-supplied contents.

Attackers may exploit this issue to execute arbitrary code with superuser privileges.

Exploit / POC

Mike Neuman OSH Environment Variable Buffer Overflow Vulnerability

An exploit is not required.

The following example exploit by Charles Stevenson (core) <[email protected]> is available:

Solution / Fix

Mike Neuman OSH Environment Variable Buffer Overflow Vulnerability

Solution:

Debian GNU/Linux has released advisory DSA 918-1, along with fixes to address various issues in osh. Please see the referenced advisory for further information.

--
Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected]:[email protected]


osh osh 1.7

References

Mike Neuman OSH Environment Variable Buffer Overflow Vulnerability

References:

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