CVE-2024-55638
Published: 10 December 2024
Summary
CVE-2024-55638 is a critical-severity Improperly Controlled Modification of Dynamically-Determined Object Attributes (CWE-915) vulnerability in Drupal Drupal. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 6.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Drupal Core is affected by a Deserialization of Untrusted Data vulnerability that permits object injection. The issue impacts versions from 7.0 before 7.102, from 8.0.0 before 10.2.11, and from 10.3.0 before 10.3.9. Drupal contains a gadget chain of methods that becomes exploitable when an application deserializes untrusted data, though the chain itself provides no direct attack path.
An unauthenticated remote attacker can supply malicious serialized data to trigger the gadget chain, resulting in remote code execution when combined with a separate deserialization flaw on the site. The vulnerability carries a CVSS score of 9.8 and is associated with CWE-502 and CWE-915.
The Drupal security advisory at https://www.drupal.org/sa-core-2024-008 addresses the issue through updates to the fixed releases listed above. The current EPSS score of 0.0969 with a peak of 0.0993 shows no material rise after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-3473
Vulnerability details
Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9. Drupal core contains a chain of methods that is exploitable when an insecure…
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deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.