CVE-2001-0669 EXPLOIT
7.5
HIGH · CVSS 2.0 · EPSS 4.4% (pctl 91)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 7.5 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| EPSS | 4.39% — more likely to be exploited than 91% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2001-10-30 |
| Last modified | 2026-06-16 |
Affected (6)
| Vendor | Product |
|---|---|
| cisco | catalyst 6000 intrusion detection system module |
| cisco | secure intrusion detection system |
| enterasys | dragon |
| iss | realsecure network sensor |
| iss | realsecure server sensor |
| snort | snort |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Cisco Secure IDS 2.0/3.0 / Snort 1.x / ISS RealSecure 5/6 / NFR 5.0 - Encoded IIS Detection Evasion | 2001-09-05 |
References
- http://marc.info/?l=bugtraq&m=99972950200602&w=2
- http://www.cisco.com/warp/public/707/cisco-intrusion-detection-obfuscation-vuln-pub.shtml
- http://www.kb.cert.org/vuls/id/548515
- http://www.securityfocus.com/bid/3292
- http://xforce.iss.net/alerts/advise95.php
- http://marc.info/?l=bugtraq&m=99972950200602&w=2
- http://www.cisco.com/warp/public/707/cisco-intrusion-detection-obfuscation-vuln-pub.shtml
- http://www.kb.cert.org/vuls/id/548515
- http://www.securityfocus.com/bid/3292
- http://xforce.iss.net/alerts/advise95.php
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