CVE-2025-56005

CRITICAL

9.8

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.19.8

SeveridadeCRITICAL

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

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado1/20/2026

Ultima modificacao2/6/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

dabeaz:ply

Fraquezas (CWE)

CWE-502

Referencias

https://github.com/bohmiiidd/Undocumented-RCE-in-PLY(cve@mitre.org)

https://github.com/bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005(cve@mitre.org)

https://github.com/tom025/ply_exploit_rejection(cve@mitre.org)

https://github.com/tom025/ply_exploit_rejection/issues/1(cve@mitre.org)

http://www.openwall.com/lists/oss-security/2026/01/23/4(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2026/01/23/5(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2026/01/28/5(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2026/01/29/1(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2026/01/29/2(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2026/01/30/1(af854a3a-2127-422b-91ae-364da2661108)

Correlacoes IOC

Sem correlacoes registradas

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