CVE-2023-51641
Published: 22 November 2024
Summary
CVE-2023-51641 is a medium-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Alltena Allegra. Its CVSS base score is 6.3 (Medium).
Operationally, ranked in the top 8.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Allegra contains a deserialization of untrusted data vulnerability in the renderFieldMatch method that permits remote code execution. The flaw affects installations of the Allegra project management application and stems from insufficient validation of user-supplied input passed to the deserialization routine, allowing an attacker to supply a malicious serialized object.
Although the vulnerability requires authentication, the product’s built-in registration mechanism enables an attacker to obtain an account with sufficient privileges. Successful exploitation grants the ability to execute arbitrary code in the context of the LOCAL SERVICE account on the affected system.
The referenced Zero Day Initiative advisory ZDI-24-106 and Trackplus 7.5.1 release notes indicate that the issue is resolved in Allegra version 7.5.1. The EPSS score has remained flat at 0.0628 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-56353
Vulnerability details
Allegra renderFieldMatch Deserialization of Unstrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Although authentication is required to exploit this vulnerability, product implements a registration mechanism that can be…
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used to create a user with a sufficient privilege level. The specific flaw exists within the renderFieldMatch method. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-22505.
- 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.