CVE-2025-24359 - ASTEVAL Arbitary Code Execution Vulnerability

CVE ID : CVE-2025-24359
Published : Jan. 24, 2025, 5:15 p.m. | 24 minutes ago
Description : ASTEVAL is an evaluator of Python expressions and statements. Prior to version 1.0.6, if an attacker can control the input to the `asteval` library, they can bypass asteval's restrictions and execute arbitrary Python code in the context of the application using the library. The vulnerability is rooted in how `asteval` performs handling of `FormattedValue` AST nodes. In particular, the `on_formattedvalue` value uses the dangerous format method of the str class. The code allows an attacker to manipulate the value of the string used in the dangerous call `fmt.format(__fstring__=val)`. This vulnerability can be exploited to access protected attributes by intentionally triggering an `AttributeError` exception. The attacker can then catch the exception and use its `obj` attribute to gain arbitrary access to sensitive or protected object properties. Version 1.0.6 fixes this issue.
Severity: 8.4 | HIGH
Visit the link for more details, such as CVSS details, affected products, timeline, and more...