github - ghsa-w95c-7994-ghpr

GHSA-W95C-7994-GHPR

Vulnerability from github – Published: 2024-12-27 06:30 – Updated: 2025-11-03 22:53

Summary

TCPDF has incorrect comparison

Details

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.

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tecnickcom/tcpdf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.8.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-56522"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-697",
      "CWE-843"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-12-27T21:07:22Z",
    "nvd_published_at": "2024-12-27T05:15:08Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-w95c-7994-ghpr",
  "modified": "2025-11-03T22:53:58Z",
  "published": "2024-12-27T06:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56522"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tecnickcom/TCPDF"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html"
    },
    {
      "type": "WEB",
      "url": "https://tcpdf.org"
    },
    {
      "type": "WEB",
      "url": "https://www.php.net/manual/en/types.comparisons.php"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "TCPDF has incorrect comparison"
}

CVE-2024-56522 (GCVE-0-2024-56522)

Vulnerability from cvelistv5 – Published: 2024-12-27 00:00 – Updated: 2025-11-03 19:32

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.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

Assigner

mitre

References

URL

Tags

	https://tcpdf.org
	https://github.com/tecnickcom/TCPDF/compare/6.7.8…
	https://github.com/tecnickcom/TCPDF/commit/d54b97…
	https://www.php.net/manual/en/types.comparisons.php

Impacted products

	Vendor	Product	Version
	tecnick	tcpdf	Affected: 0 , < 6.8.0 (semver)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-56522",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-12-30T15:54:25.367571Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-843",
                "description": "CWE-843 Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-12-30T15:54:30.643Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:32:21.561Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "tcpdf",
          "vendor": "tecnick",
          "versions": [
            {
              "lessThan": "6.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:tecnick:tcpdf:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-27T04:32:00.797Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://tcpdf.org"
        },
        {
          "url": "https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"
        },
        {
          "url": "https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89"
        },
        {
          "url": "https://www.php.net/manual/en/types.comparisons.php"
        }
      ],
      "x_generator": {
        "engine": "enrichogram 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2024-56522",
    "datePublished": "2024-12-27T00:00:00.000Z",
    "dateReserved": "2024-12-27T00:00:00.000Z",
    "dateUpdated": "2025-11-03T19:32:21.561Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-W95C-7994-GHPR

CVE-2024-56522 (GCVE-0-2024-56522)

Tags

Sightings

Nomenclature