CVE-2024-28861
Published: 22 March 2024
Summary
CVE-2024-28861 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Friendsofsymfony1 Symfony1. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 8.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
Symfony 1, a community-driven fork of the legacy 1.x branch of the Symfony PHP web framework, is affected by a deserialization vulnerability in the sfNamespacedParameterHolder class. The flaw exists in versions 1.1.0 through 1.5.18 and stems from an unsafe gadget chain that can be triggered when application code deserializes attacker-controlled data, as classified under CWE-502.
An unauthenticated remote attacker can supply a malicious serialized payload to any endpoint or component that performs untrusted deserialization. Successful exploitation yields arbitrary remote code execution with full impact on confidentiality, integrity, and availability, consistent with the CVSS 9.8 rating.
The official GitHub Security Advisory GHSA-pv9j-c53q-h433 and the referenced commit 0bd9d59c69221f49bfc8be8b871b79e12d7d171a state that version 1.5.19 contains the fix; developers are advised to upgrade and to avoid deserializing untrusted input. The associated EPSS score has remained low and stable near 0.07 with no material post-disclosure increase.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-0981
Vulnerability details
Symfony 1 is a community-driven fork of the 1.x branch of Symfony, a PHP framework for web projects. Starting in version 1.1.0 and prior to version 1.5.19, Symfony 1 has a gadget chain due to dangerous deserialization in `sfNamespacedParameterHolder` class…
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that would enable an attacker to get remote code execution if a developer deserializes user input in their project. Version 1.5.19 contains a patch for the issue.
- 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.