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TCPDF has incorrect comparison

High severity GitHub Reviewed Published Dec 27, 2024 to the GitHub Advisory Database • Updated Dec 30, 2024

Package

composer tecnickcom/tcpdf (Composer)

Affected versions

< 6.8.0

Patched versions

6.8.0

Description

An issue was discovered in TCPDF before 6.8.0. unserializeTCPDFtag uses != (aka loose comparison) and does not use a constant-time function to compare TCPDF tag hashes.

References

Published by the National Vulnerability Database Dec 27, 2024
Published to the GitHub Advisory Database Dec 27, 2024
Reviewed Dec 27, 2024
Last updated Dec 30, 2024

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
High
Integrity
None
Availability
None

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:H/I:N/A:N

EPSS score

0.045%
(17th percentile)

Weaknesses

CVE ID

CVE-2024-56522

GHSA ID

GHSA-w95c-7994-ghpr

Source code

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