What’s Vulnerable › Vulnerabilities

CVE-2002-0515

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2002-08-12 · updated 2026-06-16
• Weakness: 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 products

• Phildev Ipfilter: through 3.4.25

References

• http://www.iss.net/security_center/static/8738.php
• http://www.securityfocus.com/archive/1/265188
• http://www.securityfocus.com/bid/4403
• http://www.iss.net/security_center/static/8738.php
• http://www.securityfocus.com/archive/1/265188
• http://www.securityfocus.com/bid/4403

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