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CVE-2001-0669

Published: Oct 12, 2001Updated: Apr 16, 2026 Sources: CVE List NVDNVD-CWE-Other
7.5HIGH
NVD MITRE
EPSS Score
4.4%
Top 10.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LAu:NC:PI:PA:P
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Au:NAuthentication
None
Impact
C:PConfidentiality
Partial
I:PIntegrity
Partial
A:PAvailability
Partial
Open in CVSS calculator →

Weaknesses

NVD-CWE-Other

Affected Products

catalyst 6000 intrusion detection system moduleciscoNetworking Infrastructure
secure intrusion detection systemciscoNetworking Infrastructure
realsecure network sensoriss
On-prem
Security Products / vuln-mgmt-scanner
realsecure server sensoriss
On-premSecurity Product
Security Products / vuln-mgmt-scanner
snortsnort
On-prem
Security Products / vuln-mgmt-scanner
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
isscommercialSecurity Productsaka iss
snortoss-projectUSSecurity Products
and 2 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

References

http://marc.info/?l=bugtraq&m=99972950200602&w=2
marc.info
http://www.cisco.com/warp/public/707/cisco-intrusion-detection-obfuscation-vuln-pub.shtml
cisco.com
http://www.kb.cert.org/vuls/id/548515
kb.cert.org
and 2 more references View all →

Timeline

Published
Oct 12, 2001
Last Updated
Apr 16, 2026

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