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IPFilter 3.4.25 and earlier sets a different TTL when a...

Moderate severity Unreviewed Published Apr 30, 2022 to the GitHub Advisory Database • Updated Apr 3, 2025

Package

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Affected versions

Unknown

Patched versions

Unknown

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.

References

Published by the National Vulnerability Database Aug 12, 2002
Published to the GitHub Advisory Database Apr 30, 2022
Last updated Apr 3, 2025

Severity

Moderate

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(83rd percentile)

Weaknesses

Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. Learn more on MITRE.

CVE ID

CVE-2002-0515

GHSA ID

GHSA-x74c-jx25-vjp6

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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