medikoo es5-ext up to 0.10.62 function#copy/function#toStringTokens redos

Summaryinfo

A vulnerability was found in medikoo es5-ext up to 0.10.62. It has been declared as problematic. Affected is the function function#copy/function#toStringTokens. Such manipulation leads to redos. This vulnerability is uniquely identified as CVE-2024-27088. Local access is required to approach this attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in medikoo es5-ext up to 0.10.62. Affected by this issue is the function function#copy/function#toStringTokens. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. CVE summarizes:

es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into `function#copy` or `function#toStringTokens` may cause the script to stall. The vulnerability is patched in v0.10.63.

The weakness was disclosed 02/26/2024 as 201. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2024-27088 since 02/19/2024. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1449.003.

Upgrading to version 0.10.63 eliminates this vulnerability. Applying the patch 3551cdd7b2db08b1632841f819d008757d28e8e2 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• medikoo

Name

• es5-ext

Version

• 0.10.0
• 0.10.1
• 0.10.2
• 0.10.3
• 0.10.4
• 0.10.5
• 0.10.6
• 0.10.7
• 0.10.8
• 0.10.9
• 0.10.10
• 0.10.11
• 0.10.12
• 0.10.13
• 0.10.14
• 0.10.15
• 0.10.16
• 0.10.17
• 0.10.18
• 0.10.19
• 0.10.20
• 0.10.21
• 0.10.22
• 0.10.23
• 0.10.24
• 0.10.25
• 0.10.26
• 0.10.27
• 0.10.28
• 0.10.29
• 0.10.30
• 0.10.31
• 0.10.32
• 0.10.33
• 0.10.34
• 0.10.35
• 0.10.36
• 0.10.37
• 0.10.38
• 0.10.39
• 0.10.40
• 0.10.41
• 0.10.42
• 0.10.43
• 0.10.44
• 0.10.45
• 0.10.46
• 0.10.47
• 0.10.48
• 0.10.49
• 0.10.50
• 0.10.51
• 0.10.52
• 0.10.53
• 0.10.54
• 0.10.55
• 0.10.56
• 0.10.57
• 0.10.58
• 0.10.59
• 0.10.60
• 0.10.61
• 0.10.62

License

• open-source

Website

• Product: https://github.com/medikoo/es5-ext/

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