Описание
minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern
Summary
minimatch is vulnerable to Regular Expression Denial of Service (ReDoS) when a glob pattern contains many consecutive * wildcards followed by a literal character that doesn't appear in the test string. Each * compiles to a separate [^/]*? regex group, and when the match fails, V8's regex engine backtracks exponentially across all possible splits.
The time complexity is O(4^N) where N is the number of * characters. With N=15, a single minimatch() call takes ~2 seconds. With N=34, it hangs effectively forever.
Details
Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer.
PoC
When minimatch compiles a glob pattern, each * becomes [^/]*? in the generated regex. For a pattern like ***************X***:
When the test string doesn't contain X, the regex engine must try every possible way to distribute the characters across all the [^/]*? groups before concluding no match exists. With N groups and M characters, this is O(C(N+M, N)) — exponential.
Impact
Any application that passes user-controlled strings to minimatch() as the pattern argument is vulnerable to DoS. This includes:
- File search/filter UIs that accept glob patterns
.gitignore-style filtering with user-defined rules- Build tools that accept glob configuration
- Any API that exposes glob matching to untrusted input
Thanks to @ljharb for back-porting the fix to legacy versions of minimatch.
Пакеты
minimatch
>= 10.0.0, < 10.2.1
10.2.1
minimatch
>= 9.0.0, < 9.0.6
9.0.6
minimatch
>= 8.0.0, < 8.0.5
8.0.5
minimatch
>= 7.0.0, < 7.4.7
7.4.7
minimatch
>= 6.0.0, < 6.2.1
6.2.1
minimatch
>= 5.0.0, < 5.1.7
5.1.7
minimatch
>= 4.0.0, < 4.2.4
4.2.4
minimatch
< 3.1.3
3.1.3
Связанные уязвимости
minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Versions 10.2.0 and below are vulnerable to Regular Expression Denial of Service (ReDoS) when a glob pattern contains many consecutive * wildcards followed by a literal character that doesn't appear in the test string. Each * compiles to a separate [^/]*? regex group, and when the match fails, V8's regex engine backtracks exponentially across all possible splits. The time complexity is O(4^N) where N is the number of * characters. With N=15, a single minimatch() call takes ~2 seconds. With N=34, it hangs effectively forever. Any application that passes user-controlled strings to minimatch() as the pattern argument is vulnerable to DoS. This issue has been fixed in version 10.2.1.
minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Versions 10.2.0 and below are vulnerable to Regular Expression Denial of Service (ReDoS) when a glob pattern contains many consecutive * wildcards followed by a literal character that doesn't appear in the test string. Each * compiles to a separate [^/]*? regex group, and when the match fails, V8's regex engine backtracks exponentially across all possible splits. The time complexity is O(4^N) where N is the number of * characters. With N=15, a single minimatch() call takes ~2 seconds. With N=34, it hangs effectively forever. Any application that passes user-controlled strings to minimatch() as the pattern argument is vulnerable to DoS. This issue has been fixed in version 10.2.1.
minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Versions 10.2.0 and below are vulnerable to Regular Expression Denial of Service (ReDoS) when a glob pattern contains many consecutive * wildcards followed by a literal character that doesn't appear in the test string. Each * compiles to a separate [^/]*? regex group, and when the match fails, V8's regex engine backtracks exponentially across all possible splits. The time complexity is O(4^N) where N is the number of * characters. With N=15, a single minimatch() call takes ~2 seconds. With N=34, it hangs effectively forever. Any application that passes user-controlled strings to minimatch() as the pattern argument is vulnerable to DoS. This issue has been fixed in version 10.2.1.
minimatch is a minimal matching utility for converting glob expression ...