CVE-2024-56522
TCPDF PHP Timing Attack
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.
INFO
Published Date :
Dec. 27, 2024, 5:15 a.m.
Last Modified :
Nov. 3, 2025, 8:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade php-tcpdf packages.
- Update the affected phpMyAdmin package.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-56522.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-56522 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-56522
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-56522 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-56522 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 03, 2025
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html -
Initial Analysis by [email protected]
Apr. 17, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:* versions up to (excluding) 6.8.0 Added Reference Type MITRE: https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89 Types: Patch Added Reference Type MITRE: https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0 Types: Issue Tracking Added Reference Type MITRE: https://tcpdf.org Types: Product Added Reference Type MITRE: https://www.php.net/manual/en/types.comparisons.php Types: Not Applicable -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Dec. 30, 2024
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-843 -
New CVE Received by [email protected]
Dec. 27, 2024
Action Type Old Value New Value Added 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. Added Reference https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89 Added Reference https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0 Added Reference https://tcpdf.org Added Reference https://www.php.net/manual/en/types.comparisons.php