CVE-2006-6931

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Summary

CVECVE-2006-6931
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2007-01-16 23:28:00 UTC
Updated2026-04-23 00:35:47 UTC
DescriptionAlgorithmic complexity vulnerability in Snort before 2.6.1, during predicate evaluation in rule matching for certain rules, allows remote attackers to cause a denial of service (CPU consumption and detection outage) via crafted network traffic, aka a "backtracking attack."

Risk And Classification

Primary CVSS: v2.0 5 from [email protected]

AV:N/AC:L/Au:N/C:N/I:N/A:P

Problem Types: NVD-CWE-Other | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Snort Snort All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Just a moment... af854a3a-2127-422b-91ae-364da2661108 www.snort.org
IBM X-Force Exchange af854a3a-2127-422b-91ae-364da2661108 exchange.xforce.ibmcloud.com
Snort Backtracking Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
ACSAC (www.acsac.org): Backtracking Algorithmic Complexity Attacks Against a NIDS af854a3a-2127-422b-91ae-364da2661108 www.acsac.org
www.cs.wisc.edu/~smithr/pubs/acsac2006.pdf af854a3a-2127-422b-91ae-364da2661108 www.cs.wisc.edu Vendor Advisory
www.acsac.org/2006/papers/54.pdf af854a3a-2127-422b-91ae-364da2661108 www.acsac.org Vendor Advisory
www.cs.wisc.edu/~smithr/pubs/randy_smith_acsac2006.zip af854a3a-2127-422b-91ae-364da2661108 www.cs.wisc.edu
Advisories - Mandriva Linux af854a3a-2127-422b-91ae-364da2661108 www.mandriva.com
[Dailydave] Algorithmic Bugs af854a3a-2127-422b-91ae-364da2661108 lists.immunitysec.com
www.osvdb.org/32096 af854a3a-2127-422b-91ae-364da2661108 www.osvdb.org
Snort Rule Matching Backtrack Denial of Service Vulnerability - Advisories - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com
Gentoo update for snort - Advisories - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com
www.acsac.org/2006/advance_program.html af854a3a-2127-422b-91ae-364da2661108 www.acsac.org
Mandriva update for snort - Advisories - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com
SecurityTracker.com Archives - Snort Rule Matching Complexity Lets Remote Users Deny Service via Backtracking Attacks af854a3a-2127-422b-91ae-364da2661108 securitytracker.com
Gentoo Linux Documentation -- Snort: Denial of Service af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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