32094 : Snort DCE/RPC Pre-Processor Packet Reassembly Remote Overflow
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
7	519	over 4 years ago	about 1 month ago	1 times	100%

Timeline

Disclosure Date	Exploit Publish Date
2007-02-17	2007-02-23

Description

A remote overflow exists in Snort. The DCE/RPC Pre-Processor fails to check if traffic is part of a valid TCP session, and multiple "Write AndX" requests can be chained in the same TCP segment resulting in a stack overflow. With a specially crafted SMB packet, an attacker can cause arbitrary code execution resulting in a loss of integrity.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Workaround, Upgrade
Exploit: Exploit Public
Disclosure: OSVDB Verified, Vendor Verified
OSVDB: Security Software

Technical

Users who have disabled the DCE/RPC preprocessor are not vulnerable. However, the DCE/RPC preprocessor is enabled by default.

Solution

Upgrade to version 2.6.1.3 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround:
Disable the DCE/RPC preprocessor by removing the DCE/RPC preprocessor directives from snort.conf and restarting Snort. However, be advised that disabling the DCE/RPC preprocessor reduces detection capabilities for attacks in DCE/RPC traffic.

Products

Sourcefire, Inc.	Snort	2.6.1.2
		2.6.1.1
		2.6.1.0
		2.7.0 beta 1
		2.6.1.3

Nortel Networks	Threat Protection System Intrusion Sensor	4.1
		4.6
		4.5
	Threat Protection System Defense Center	4.1
		4.6
		4.5

References

Security Tracker: 1017670
CERT VU: 196240
CVE ID: 2006-5276 (see also: NVD)
Bugtraq ID: 22616
Secunia Advisory ID: 24190 24235 24239 24240 24272 26746
SCIP VulDB ID: 2948 2950 2952
ISS X-Force ID: 31275
Exploit Database: 3362
Milw0rm: 3362
VUPEN Advisory: ADV-2007-0656 ADV-2007-0668
Other Advisory URL: http://isc.sans.org/diary.html?storyid=2280
http://www.gentoo.org/security/en/glsa/glsa-200703-01.xml
http://www.iss.net/threats/257.html
https://www.redhat.com/archives/fedora-package-announce/2007-September/msg00122.html
News Article: http://www.computerworld.com/action/article.do?command=viewArticleBasic&taxonomyName=security&articleId=9011574
Vendor Specific Advisory URL: http://www.snort.org/docs/advisory-2007-02-19.html
http://www116.nortelnetworks.com/pub/repository/CLARIFY/DOCUMENT/2007/08/021923-01.pdf
http://www130.nortelnetworks.com/go/main.jsp?cscat=BLTNDETAIL&DocumentOID=540173
US-CERT Cyber Security Alert: TA07-050A

Tools & Filters

Snort	10158 10159 10160
	24686 24749 27749

Credit

Neel Mehta - -

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2007-02-20 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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