FKIE_CVE-2024-56522
Vulnerability from fkie_nvd - Published: 2024-12-27 05:15 - Updated: 2026-06-17 08:12
Severity
Summary
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
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| tcpdf_project | tcpdf | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "tcpdf",
"vendor": "tecnick",
"versions": [
{
"lessThan": "6.8.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F63E1050-BC4A-4815-B891-AC4671D79E06",
"versionEndExcluding": "6.8.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se descubri\u00f3 un problema en TCPDF antes de 6.8.0. unserializeTCPDFtag usa != (tambi\u00e9n conocido como comparaci\u00f3n flexible) y no usa una funci\u00f3n de tiempo constante para comparar hashes de etiquetas TCPDF."
}
],
"id": "CVE-2024-56522",
"lastModified": "2026-06-17T08:12:17.787",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-56522",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-12-30T15:54:25.367571Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-12-27T05:15:08.130",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Patch"
],
"url": "https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89"
},
{
"source": "cve@mitre.org",
"tags": [
"Issue Tracking"
],
"url": "https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"
},
{
"source": "cve@mitre.org",
"tags": [
"Product"
],
"url": "https://tcpdf.org"
},
{
"source": "cve@mitre.org",
"tags": [
"Not Applicable"
],
"url": "https://www.php.net/manual/en/types.comparisons.php"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-843"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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