Unrated severityNVD Advisory· Published Oct 30, 2001· Updated Apr 16, 2026
CVE-2001-0669
CVE-2001-0669
Description
Various Intrusion Detection Systems (IDS) including (1) Cisco Secure Intrusion Detection System, (2) Cisco Catalyst 6000 Intrusion Detection System Module, (3) Dragon Sensor 4.x, (4) Snort before 1.8.1, (5) ISS RealSecure Network Sensor 5.x and 6.x before XPU 3.2, and (6) ISS RealSecure Server Sensor 5.5 and 6.0 for Windows, allow remote attackers to evade detection of HTTP attacks via non-standard "%u" Unicode encoding of ASCII characters in the requested URL.
Affected products
8- cpe:2.3:a:cisco:catalyst_6000_intrusion_detection_system_module:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:secure_intrusion_detection_system:*:*:*:*:*:*:*:*
cpe:2.3:a:iss:realsecure_network_sensor:5.x:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:iss:realsecure_network_sensor:5.x:*:*:*:*:*:*:*
- cpe:2.3:a:iss:realsecure_network_sensor:6.x:*:*:*:*:*:*:*
cpe:2.3:a:iss:realsecure_server_sensor:5.5:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:iss:realsecure_server_sensor:5.5:*:*:*:*:*:*:*
- cpe:2.3:a:iss:realsecure_server_sensor:6.0:*:*:*:*:*:*:*
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- www.cisco.com/warp/public/707/cisco-intrusion-detection-obfuscation-vuln-pub.shtmlnvdPatchVendor Advisory
- xforce.iss.net/alerts/advise95.phpnvdPatchVendor Advisory
- www.kb.cert.org/vuls/id/548515nvdUS Government Resource
- marc.infonvd
- www.securityfocus.com/bid/3292nvd
News mentions
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