Vulnerability Information
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
ASTEVAL Vulnerable to Maliciously Crafted Format Strings Leading to Sandbox Escape
Vulnerability 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.
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability Type
使用外部控制的格式字符串
Vulnerability Title
ASTEVAL 安全漏洞
Vulnerability Description
ASTEVAL是lmfit开源的一个使用 ast 模块对 python 表达式进行简约求值的库。 ASTEVAL 1.0.6之前版本存在安全漏洞，该漏洞源于如果攻击者可以控制asteval库的输入，就可以绕过限制并在使用该库的应用程序环境中执行任意Python代码。
CVSS Information
N/A
Vulnerability Type
N/A