CVE-2025-56005

תיאור (מקור, אנגלית)

An undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code Execution (RCE) via the `picklefile` parameter in the `yacc()` function. This parameter accepts a `.pkl` file that is deserialized with `pickle.load()` without validation. Because `pickle` allows execution of embedded code via `__reduce__()`, an attacker can achieve code execution by passing a malicious pickle file. The parameter is not mentioned in official documentation or the GitHub repository, yet it is active in the PyPI version. This introduces a stealthy backdoor and persistence risk. NOTE: A third-party states that this vulnerability should be rejected because the proof of concept does not demonstrate arbitrary code execution and fails to complete successfully.

מדדים

CVSS 3.1

9.8 (CRITICAL) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — סבירות ניצול

17% (אחוזון 100) נכון ל-26/7/2026

CWE

CWE-502

מוצרים מושפעים

dabeaz: ply

קישורים

• https://github.com/bohmiiidd/Undocumented-RCE-in-PLY ExploitThird Party Advisory
• https://github.com/bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005 ExploitThird Party Advisory
• https://github.com/tom025/ply_exploit_rejection ExploitMitigationThird Party Advisory
• http://www.openwall.com/lists/oss-security/2026/01/23/4 ExploitMailing List
• http://www.openwall.com/lists/oss-security/2026/01/28/5 ExploitMailing List
• http://www.openwall.com/lists/oss-security/2026/01/29/1 ExploitMailing List
• https://github.com/tom025/ply_exploit_rejection/issues/1
• http://www.openwall.com/lists/oss-security/2026/01/23/5 Mailing List
• http://www.openwall.com/lists/oss-security/2026/01/29/2 Mailing List
• http://www.openwall.com/lists/oss-security/2026/01/30/1