Vulnerability Information
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Vulnerability Title
Addressable has a Regular Expression Denial of Service in Addressable templates
Vulnerability Description
Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.3.0 to before 2.9.0, within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking. Templates using the * (explode) modifier with any expansion operator (e.g., {foo*}, {+var*}, {#var*}, {/var*}, {.var*}, {;var*}, {?var*}, {&var*}) generate patterns with nested unbounded quantifiers that are O(2^n) when matched against a maliciously crafted URI. Templates using multiple variables with the + or # operators (e.g., {+v1,v2,v3}) generate patterns with O(n^k) complexity due to the comma separator being within the matched character class, causing ambiguous backtracking across k variables. When matched against a maliciously crafted URI, this can result in catastrophic backtracking and uncontrolled resource consumption, leading to denial of service. This vulnerability is fixed in 2.9.0.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
CWE-1333
Vulnerability Title
Addressable 安全漏洞
Vulnerability Description
Addressable是Bob Aman个人开发者的一个Ruby库。 Addressable 2.3.0至2.9.0之前版本存在安全漏洞，该漏洞源于URI模板实现中，两类URI模板生成的正则表达式存在灾难性回溯，可能导致匹配恶意URI时资源消耗失控，导致拒绝服务。
CVSS Information
N/A
Vulnerability Type
N/A