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cpython

When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues

CVE-2025-13837 identifies a resource exhaustion vulnerability in the plistlib module of CPython, the reference implementation of the Python programming language maintained by the Python Software Foundation. The plistlib module is responsible for parsing plist (property list) files, commonly used for configuration and data serialization, especially on macOS and iOS platforms. The vulnerability stems from the module reading data sizes directly from the plist file without adequate validation or bounds checking. An attacker who can supply a malicious plist file can specify arbitrarily large size values, causing the parser to allocate excessive memory buffers. This uncontrolled resource consumption can lead to out-of-memory conditions, causing the Python process to crash or become unresponsive, resulting in a denial of service. The vulnerability affects multiple CPython versions, including 3.11.0 through 3.15.0a1, and even the initial version 0, indicating a long-standing issue. The CVSS 4.0 vector indicates local attack vector (AV:L), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and limited impact on availability (VA:L), with no impact on confidentiality or integrity. The vulnerability is categorized under CWE-400, highlighting uncontrolled resource consumption. No known exploits have been reported in the wild, and no official patches have been linked yet, suggesting that mitigation may rely on cautious handling of plist files or third-party patches. This vulnerability primarily impacts applications and systems that use CPython to parse plist files, especially those that process untrusted or user-supplied plist data.

Detailed information about CVE-2025-13837: Vulnerability in Python Software Foundation CPython affecting Python Software Foundation CPython. Get real-time updat

CVE-2025-13837: Vulnerability in Python Software Foundation CPython - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-13837: Vulnerability in Python Software Foundation CPython

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