CVE-2006-4911

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2006-09-21 · updated 2026-06-16

Description

Unspecified vulnerability in Cisco IPS 5.0 before 5.0(6p2) and 5.1 before 5.1(2), when running in inline or promiscuous mode, allows remote attackers to bypass traffic inspection via a "crafted sequence of fragmented IP packets".

Affected products

Cisco Ips Sensor Software: from 5.0 before 5.0\(6p2\); from 5.1 before 5.1\(2\) — fixed in 5.0\(6p2\), 5.1\(2\)

How to fix

Upgrade to a fixed version: Cisco Ips Sensor Software 5.0\(6p2\), 5.1\(2\). Check the vendor advisory for mitigations.

References

http://secunia.com/advisories/22022
http://securitytracker.com/id?1016891
http://www.cisco.com/warp/public/707/cisco-sa-20060920-ips.shtml
http://www.kb.cert.org/vuls/id/658884
http://www.osvdb.org/29036
http://www.securityfocus.com/bid/20127
http://www.vupen.com/english/advisories/2006/3721
https://exchange.xforce.ibmcloud.com/vulnerabilities/29058
http://secunia.com/advisories/22022
http://securitytracker.com/id?1016891
http://www.cisco.com/warp/public/707/cisco-sa-20060920-ips.shtml
http://www.kb.cert.org/vuls/id/658884

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