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Insecure Library Loading
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Serial Line Sniffer "HOME" Environment Variable Buffer Overflow

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Release Date:  2006-01-16    Last Update:  2006-08-04    Views:  7,899

Secunia Advisory SA18497

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Unpatched

CVE Reference(s):

Description


Sintigan has discovered a vulnerability in Serial Line Sniffer (slsnif), which potentially can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a boundary error in "readRC()" in the handling of the "HOME" environment variable. This can be exploited to cause a stack-based buffer overflow which potentially allows arbitrary code execution.

Successful exploitation requires that slsnif is setuid root.

The vulnerability has been confirmed in version 0.4.4. Other versions may also be affected.


Solution:
Remove the suid bits from the binary.

Provided and/or discovered by:
Sintigan

Original Advisory:
http://shellcoders.com/sintigan/slsnif-ploit.pl

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Serial Line Sniffer "HOME" Environment Variable Buffer Overflow

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