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Insecure Library Loading
Highly critical

LSH Error Checking Heap Overflow Vulnerability

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Release Date:  2003-09-22    Views:  9,268

Secunia Advisory SA9805

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been identified in LSH, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in "read_line.c" when checking for errors. This can be exploited to cause a heap overflow by sending an overly long, specially crafted string.

Successful exploitation allows execution of arbitrary code on the vulnerable system and doesn't require user authentication.

An exploit has been published.

NOTE: Reportedly, similar bugs were also identified in the check for channel number allocation and in the experimental client SRP code.


Solution:
Apply patch for 1.4.2, or update to version 1.4.3 or 1.5.3.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Bennett Todd

Original Advisory:
http://lists.lysator.liu.se/pipermail/lsh-bugs/2003q3/000127.html

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: LSH Error Checking Heap Overflow Vulnerability

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