CVE-2025-56005

Katalog CVE

CVSS 9.8 · Critical EPSS 19,1%

Kerentanan Deserialization of Untrusted Data pada dabeaz ply. Skor CVSS 3.1 9.8 (Critical) menurut CISA ADP.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

20 Januari 2026

Terakhir diubah

17 September 2026

Status NVD

Modified

CVSS 3.1

9.8 (Critical), sumber CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-502: Deserialization of Untrusted Data

EPSS (30 hari)

19,1% peluang dieksploitasi; lebih tinggi dari 97,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/tom025/ply_exploit_rejection exploit · mitigasi · advisory pihak ketiga
• https://github.com/bohmiiidd/Undocumented-RCE-in-PLY exploit · advisory pihak ketiga
• https://github.com/bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005 exploit · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2026/01/23/4 exploit · mailing list
• http://www.openwall.com/lists/oss-security/2026/01/28/5 exploit · mailing list
• http://www.openwall.com/lists/oss-security/2026/01/29/1 exploit · mailing 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
• https://access.redhat.com/security/cve/CVE-2025-56005
• https://bugzilla.redhat.com/show_bug.cgi?id=2431308
• https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-56005.json