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2 vulnerabilities found for asteval by lmfit

CVE-2025-24359 (GCVE-0-2025-24359)

Vulnerability from cvelistv5 – Published: 2025-01-24 16:52 – Updated: 2025-02-12 20:01
VLAI?
Title
ASTEVAL Vulnerable to Maliciously Crafted Format Strings Leading to Sandbox Escape
Summary
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)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-134 - Use of Externally-Controlled Format String
  • CWE-749 - Exposed Dangerous Method or Function
Assigner
References
Impacted products
Vendor Product Version
lmfit asteval Affected: < 1.0.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-24359 (GCVE-0-2025-24359)

Vulnerability from nvd – Published: 2025-01-24 16:52 – Updated: 2025-02-12 20:01
VLAI?
Title
ASTEVAL Vulnerable to Maliciously Crafted Format Strings Leading to Sandbox Escape
Summary
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)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-134 - Use of Externally-Controlled Format String
  • CWE-749 - Exposed Dangerous Method or Function
Assigner
References
Impacted products
Vendor Product Version
lmfit asteval Affected: < 1.0.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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