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Billion laughs attack in c3p0

High severity GitHub Reviewed Published Apr 23, 2019 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

maven com.mchange:c3p0 (Maven)

Affected versions

<= 0.9.5.3

Patched versions

0.9.5.4

Description

c3p0 version < 0.9.5.4 may be exploited by a billion laughs attack when loading XML configuration due to missing protections against recursive entity expansion when loading configuration.

References

Published by the National Vulnerability Database Apr 22, 2019
Reviewed Apr 23, 2019
Published to the GitHub Advisory Database Apr 23, 2019
Last updated Feb 1, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

3.158%
(91st percentile)

Weaknesses

CVE ID

CVE-2019-5427

GHSA ID

GHSA-84p2-vf58-xhxv

Source code

No known source code
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