L2TPD Write_Packet Block BSS based Buffer Overflow Vulnerability

BID:10466

Info

L2TPD Write_Packet Block BSS based Buffer Overflow Vulnerability

Bugtraq ID: 10466
Class: Boundary Condition Error
CVE: CVE-2004-0649
Remote: Yes
Local: No
Published: Jun 04 2004 12:00AM
Updated: Jul 12 2009 05:16AM
Credit: Disclosure of this issue is credited to Thomas Walpuski <[email protected]>.
Vulnerable: l2tpd l2tpd 0.69
l2tpd l2tpd 0.68
l2tpd l2tpd 0.67
+ Debian Linux 3.0
l2tpd l2tpd 0.66
l2tpd l2tpd 0.65
l2tpd l2tpd 0.64
l2tpd l2tpd 0.63
l2tpd l2tpd 0.62
Gentoo Linux 1.4
Not Vulnerable:

Discussion

L2TPD Write_Packet Block BSS based Buffer Overflow Vulnerability

l2tpd is reportedly affected by a BSS (block started by symbol) based buffer overflow vulnerability. This issue is due to a failure of the application to properly validate user supplied string lengths.

This issue has been reported to be extremely difficult to exploit; code execution is extremely unlikely. This issue might be leveraged to cause the affected application to behave unpredictably and perhaps crash.

Exploit / POC

L2TPD Write_Packet Block BSS based Buffer Overflow Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] &lt;mailto:[email protected]&gt;.

Solution / Fix

L2TPD Write_Packet Block BSS based Buffer Overflow Vulnerability

Solution:
Debian has released security advisory DSA 530-1 to address this issue. Please see the attached advisory for details on obtaining and applying fixes.

Gentoo has released advisory GLSA 200407-17 dealing with this issue. They have advised that users take the following actions and upgrade to the latest stable version:

# emerge sync

# emerge -pv ">=net-l2tpd-0.69-r2"
# emerge ">=net-l2tpd-0.69-r2"

For more information, please see the referenced Gentoo advisory.


l2tpd l2tpd 0.67

References

L2TPD Write_Packet Block BSS based Buffer Overflow Vulnerability

References:

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