CVEvulnerability

CVE-2002-0515

5.0 MEDIUM Published 2002-08-12 Modified 2026-06-16 Official page ↗

Status: Modified
Published: 2002-08-12
Last modified: 2026-06-16
Assigner: [email protected]
CVSS 2.0 ([email protected]): 5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses: CWE-203

Description

IPFilter 3.4.25 and earlier sets a different TTL when a port is being filtered than when it is not being filtered, which allows remote attackers to identify filtered ports by comparing TTLs.

Affected configurations

• phildev ipfilter (<= 3.4.25)

Weakness · CWE (1)

CWE-203 Observable Discrepancy weakness

Referenced by CWE · observed example (3)

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness
CWE-203 Observable Discrepancy weakness
CWE-204 Observable Response Discrepancy weakness

References

http://www.iss.net/security_center/static/8738.php Broken Link, Vendor Advisory
http://www.securityfocus.com/archive/1/265188 Broken Link, Third Party Advisory, VDB Entry, Vendor Advisory
http://www.securityfocus.com/bid/4403 Broken Link, Exploit, Third Party Advisory, VDB Entry, Vendor Advisory
http://www.iss.net/security_center/static/8738.php Broken Link, Vendor Advisory
http://www.securityfocus.com/archive/1/265188 Broken Link, Third Party Advisory, VDB Entry, Vendor Advisory
http://www.securityfocus.com/bid/4403 Broken Link, Exploit, Third Party Advisory, VDB Entry, Vendor Advisory