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Insecure Library Loading
Moderately critical

l2tpd "write_packet()" Buffer Overflow Vulnerability

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Release Date:  2004-06-07    Last Update:  2004-07-14    Views:  10,398

Secunia Advisory SA11788

Where:

From remote

Impact:

System access

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Thomas Walpuski has reported a vulnerability in l2tpd, which potentially can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the "write_packet()" function. This can be exploited to cause a BSS-based (Block Storage Segment) buffer overflow by faking a L2TP tunnel establishment and then sending a specially crafted packet.

Successful exploitation may crash the application or potentially allow execution of arbitrary code. However, this has not been proven.

The vulnerability has been reported in all current versions.


Solution:
Use another product.

Provided and/or discovered by:
Thomas Walpuski

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: l2tpd "write_packet()" Buffer Overflow Vulnerability

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