|
Snort frag3 Preprocessor Packet Reassembly Vulnerability
|
|
Secunia Advisory:
|
SA18959
|
|
|
Release Date:
|
2006-02-27
|
|
Popularity:
|
7,832 views
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
Security Bypass
|
|
Where:
|
From remote
|
|
Solution Status:
|
Unpatched
|
|
| Software: | Snort 2.4.x
|
|
|
Subscribe:
|
Instant alerts on relevant vulnerabilities 
|
|
| CVE reference: | CVE-2006-0839
|
|
Description:
siouxsie has reported a vulnerability in Snort, which potentially can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to an error in the frag3 preprocessor which causes snort to skip "ip_option_length" bytes from the end of the IP options when reassembling a packet. This can potentially be exploited to bypass signature detection via certain specially-crafted fragmented packets.
The vulnerability has been reported in version 2.4.3. Other versions may also be affected.
Solution:
Filter potentially malicious fragmented IP packets with a firewall.
Provided and/or discovered by:
siouxsie
|
|
|
Track this Secunia Advisory
|
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released.
Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.
|
|
|
About this Secunia Advisory
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
