Security Advisory SA18497 - Serial Line Sniffer "HOME" Environment Variable Buffer Overflow

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Secunia Advisory SA18497

Serial Line Sniffer "HOME" Environment Variable Buffer Overflow

Secunia Advisory

SA18497

Release Date

2006-01-16

Last Update

2006-08-04

Popularity

7,566 views

Comments

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Criticality level

Less critical

Impact

Privilege escalation

Where

Local system

Authentication level

This information is available to Secunia VIM customers

Report reliability

This information is available to Secunia VIM customers

Solution Status

Unpatched

Systems affected

This information is available to Secunia VIM customers

Approve distribution

This information is available to Secunia VIM customers

Remediation status

Secunia VIM

Software:

Serial Line Sniffer (slsnif) 0.x

Secunia CVSS Score

This information is available to Secunia VIM Customers

CVE Reference(s)

CVE-2006-0196 CVSS score available to Secunia VIM customers

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

Changelog
Further details available to Secunia VIM customers

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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Secunia Advisory SA18497

Serial Line Sniffer "HOME" Environment Variable Buffer Overflow

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