npm version

app/node_modules/minimatch/README.md

@@ -10,6 +10,43 @@ This is the matching library used internally by npm.
 It works by converting glob expressions into JavaScript `RegExp`
 objects.
 
+## Important Security Consideration!
+
+> [!WARNING]  
+> This library uses JavaScript regular expressions. Please read
+> the following warning carefully, and be thoughtful about what
+> you provide to this library in production systems.
+
+_Any_ library in JavaScript that deals with matching string
+patterns using regular expressions will be  subject to
+[ReDoS](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS)
+if the pattern is generated using untrusted input.
+
+Efforts have been made to mitigate risk as much as is feasible in
+such a library, providing maximum recursion depths and so forth,
+but these measures can only ultimately protect against accidents,
+not malice. A dedicated attacker can _always_ find patterns that
+cannot be defended against by a bash-compatible glob pattern
+matching system that uses JavaScript regular expressions.
+
+To be extremely clear:
+
+> [!WARNING]  
+> **If you create a system where you take user input, and use
+> that input as the source of a Regular Expression pattern, in
+> this or any extant glob matcher in JavaScript, you will be
+> pwned.**
+
+A future version of this library _may_ use a different matching
+algorithm which does not exhibit backtracking problems. If and
+when that happens, it will likely be a sweeping change, and those
+improvements will **not** be backported to legacy versions.
+
+In the near term, it is not reasonable to continue to play
+whack-a-mole with security advisories, and so any future ReDoS
+reports will be considered "working as intended", and resolved
+entirely by this warning.
+
 ## Usage
 
 ```javascript

app/node_modules/minimatch/minimatch.js

@@ -168,6 +168,8 @@ class Minimatch {
     if (!options) options = {}
 
     this.options = options
+    this.maxGlobstarRecursion = options.maxGlobstarRecursion !== undefined
+      ? options.maxGlobstarRecursion : 200
     this.set = []
     this.pattern = pattern
     this.windowsPathsNoEscape = !!options.windowsPathsNoEscape ||
@@ -255,114 +257,172 @@ class Minimatch {
   // out of pattern, then that's fine, as long as all
   // the parts match.
   matchOne (file, pattern, partial) {
-    var options = this.options
+    if (pattern.indexOf(GLOBSTAR) !== -1) {
+      return this._matchGlobstar(file, pattern, partial, 0, 0)
+    }
+    return this._matchOne(file, pattern, partial, 0, 0)
+  }
 
-    this.debug('matchOne',
-      { 'this': this, file: file, pattern: pattern })
+  _matchGlobstar (file, pattern, partial, fileIndex, patternIndex) {
+    // find first globstar from patternIndex
+    let firstgs = -1
+    for (let i = patternIndex; i < pattern.length; i++) {
+      if (pattern[i] === GLOBSTAR) { firstgs = i; break }
+    }
 
-    this.debug('matchOne', file.length, pattern.length)
+    // find last globstar
+    let lastgs = -1
+    for (let i = pattern.length - 1; i >= 0; i--) {
+      if (pattern[i] === GLOBSTAR) { lastgs = i; break }
+    }
 
-    for (var fi = 0,
-        pi = 0,
-        fl = file.length,
-        pl = pattern.length
-        ; (fi < fl) && (pi < pl)
-        ; fi++, pi++) {
+    const head = pattern.slice(patternIndex, firstgs)
+    const body = partial ? pattern.slice(firstgs + 1) : pattern.slice(firstgs + 1, lastgs)
+    const tail = partial ? [] : pattern.slice(lastgs + 1)
+
+    // check the head
+    if (head.length) {
+      const fileHead = file.slice(fileIndex, fileIndex + head.length)
+      if (!this._matchOne(fileHead, head, partial, 0, 0)) {
+        return false
+      }
+      fileIndex += head.length
+    }
+
+    // check the tail
+    let fileTailMatch = 0
+    if (tail.length) {
+      if (tail.length + fileIndex > file.length) return false
+
+      const tailStart = file.length - tail.length
+      if (this._matchOne(file, tail, partial, tailStart, 0)) {
+        fileTailMatch = tail.length
+      } else {
+        // affordance for stuff like a/**/* matching a/b/
+        if (file[file.length - 1] !== '' ||
+            fileIndex + tail.length === file.length) {
+          return false
+        }
+        if (!this._matchOne(file, tail, partial, tailStart - 1, 0)) {
+          return false
+        }
+        fileTailMatch = tail.length + 1
+      }
+    }
+
+    // if body is empty (single ** between head and tail)
+    if (!body.length) {
+      let sawSome = !!fileTailMatch
+      for (let i = fileIndex; i < file.length - fileTailMatch; i++) {
+        const f = String(file[i])
+        sawSome = true
+        if (f === '.' || f === '..' ||
+            (!this.options.dot && f.charAt(0) === '.')) {
+          return false
+        }
+      }
+      return partial || sawSome
+    }
+
+    // split body into segments at each GLOBSTAR
+    const bodySegments = [[[], 0]]
+    let currentBody = bodySegments[0]
+    let nonGsParts = 0
+    const nonGsPartsSums = [0]
+    for (const b of body) {
+      if (b === GLOBSTAR) {
+        nonGsPartsSums.push(nonGsParts)
+        currentBody = [[], 0]
+        bodySegments.push(currentBody)
+      } else {
+        currentBody[0].push(b)
+        nonGsParts++
+      }
+    }
+
+    let idx = bodySegments.length - 1
+    const fileLength = file.length - fileTailMatch
+    for (const b of bodySegments) {
+      b[1] = fileLength - (nonGsPartsSums[idx--] + b[0].length)
+    }
+
+    return !!this._matchGlobStarBodySections(
+      file, bodySegments, fileIndex, 0, partial, 0, !!fileTailMatch
+    )
+  }
+
+  // return false for "nope, not matching"
+  // return null for "not matching, cannot keep trying"
+  _matchGlobStarBodySections (
+    file, bodySegments, fileIndex, bodyIndex, partial, globStarDepth, sawTail
+  ) {
+    const bs = bodySegments[bodyIndex]
+    if (!bs) {
+      // just make sure there are no bad dots
+      for (let i = fileIndex; i < file.length; i++) {
+        sawTail = true
+        const f = file[i]
+        if (f === '.' || f === '..' ||
+            (!this.options.dot && f.charAt(0) === '.')) {
+          return false
+        }
+      }
+      return sawTail
+    }
+
+    const [body, after] = bs
+    while (fileIndex <= after) {
+      const m = this._matchOne(
+        file.slice(0, fileIndex + body.length),
+        body,
+        partial,
+        fileIndex,
+        0
+      )
+      // if limit exceeded, no match. intentional false negative,
+      // acceptable break in correctness for security.
+      if (m && globStarDepth < this.maxGlobstarRecursion) {
+        const sub = this._matchGlobStarBodySections(
+          file, bodySegments,
+          fileIndex + body.length, bodyIndex + 1,
+          partial, globStarDepth + 1, sawTail
+        )
+        if (sub !== false) {
+          return sub
+        }
+      }
+      const f = file[fileIndex]
+      if (f === '.' || f === '..' ||
+          (!this.options.dot && f.charAt(0) === '.')) {
+        return false
+      }
+      fileIndex++
+    }
+    return partial || null
+  }
+
+  _matchOne (file, pattern, partial, fileIndex, patternIndex) {
+    let fi, pi, fl, pl
+    for (
+      fi = fileIndex, pi = patternIndex, fl = file.length, pl = pattern.length
+      ; (fi < fl) && (pi < pl)
+      ; fi++, pi++
+    ) {
       this.debug('matchOne loop')
-      var p = pattern[pi]
-      var f = file[fi]
+      const p = pattern[pi]
+      const f = file[fi]
 
       this.debug(pattern, p, f)
 
       // should be impossible.
       // some invalid regexp stuff in the set.
       /* istanbul ignore if */
-      if (p === false) return false
-
-      if (p === GLOBSTAR) {
-        this.debug('GLOBSTAR', [pattern, p, f])
-
-        // "**"
-        // a/**/b/**/c would match the following:
-        // a/b/x/y/z/c
-        // a/x/y/z/b/c
-        // a/b/x/b/x/c
-        // a/b/c
-        // To do this, take the rest of the pattern after
-        // the **, and see if it would match the file remainder.
-        // If so, return success.
-        // If not, the ** "swallows" a segment, and try again.
-        // This is recursively awful.
-        //
-        // a/**/b/**/c matching a/b/x/y/z/c
-        // - a matches a
-        // - doublestar
-        //   - matchOne(b/x/y/z/c, b/**/c)
-        //     - b matches b
-        //     - doublestar
-        //       - matchOne(x/y/z/c, c) -> no
-        //       - matchOne(y/z/c, c) -> no
-        //       - matchOne(z/c, c) -> no
-        //       - matchOne(c, c) yes, hit
-        var fr = fi
-        var pr = pi + 1
-        if (pr === pl) {
-          this.debug('** at the end')
-          // a ** at the end will just swallow the rest.
-          // We have found a match.
-          // however, it will not swallow /.x, unless
-          // options.dot is set.
-          // . and .. are *never* matched by **, for explosively
-          // exponential reasons.
-          for (; fi < fl; fi++) {
-            if (file[fi] === '.' || file[fi] === '..' ||
-              (!options.dot && file[fi].charAt(0) === '.')) return false
-          }
-          return true
-        }
-
-        // ok, let's see if we can swallow whatever we can.
-        while (fr < fl) {
-          var swallowee = file[fr]
-
-          this.debug('\nglobstar while', file, fr, pattern, pr, swallowee)
-
-          // XXX remove this slice.  Just pass the start index.
-          if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
-            this.debug('globstar found match!', fr, fl, swallowee)
-            // found a match.
-            return true
-          } else {
-            // can't swallow "." or ".." ever.
-            // can only swallow ".foo" when explicitly asked.
-            if (swallowee === '.' || swallowee === '..' ||
-              (!options.dot && swallowee.charAt(0) === '.')) {
-              this.debug('dot detected!', file, fr, pattern, pr)
-              break
-            }
-
-            // ** swallows a segment, and continue.
-            this.debug('globstar swallow a segment, and continue')
-            fr++
-          }
-        }
-
-        // no match was found.
-        // However, in partial mode, we can't say this is necessarily over.
-        // If there's more *pattern* left, then
-        /* istanbul ignore if */
-        if (partial) {
-          // ran out of file
-          this.debug('\n>>> no match, partial?', file, fr, pattern, pr)
-          if (fr === fl) return true
-        }
-        return false
-      }
+      if (p === false || p === GLOBSTAR) return false
 
       // something other than **
       // non-magic patterns just have to match exactly
       // patterns with magic have been turned into regexps.
-      var hit
+      let hit
       if (typeof p === 'string') {
         hit = f === p
         this.debug('string match', p, f, hit)
@@ -374,17 +434,6 @@ class Minimatch {
       if (!hit) return false
     }
 
-    // Note: ending in / means that we'll get a final ""
-    // at the end of the pattern.  This can only match a
-    // corresponding "" at the end of the file.
-    // If the file ends in /, then it can only match a
-    // a pattern that ends in /, unless the pattern just
-    // doesn't have any more for it. But, a/b/ should *not*
-    // match "a/b/*", even though "" matches against the
-    // [^/]*? pattern, except in partial mode, where it might
-    // simply not be reached yet.
-    // However, a/b/ should still satisfy a/*
-
     // now either we fell off the end of the pattern, or we're done.
     if (fi === fl && pi === pl) {
       // ran out of pattern and filename at the same time.
@@ -533,6 +582,9 @@ class Minimatch {
             continue
           }
 
+          // coalesce consecutive non-globstar * characters
+          if (c === '*' && stateChar === '*') continue
+
           // if we already have a stateChar, then it means
           // that there was something like ** or +? in there.
           // Handle the stateChar, then proceed with this one.

app/node_modules/minimatch/package.json

@@ -5,7 +5,7 @@
   "publishConfig": {
     "tag": "legacy-v5"
   },
-  "version": "5.1.6",
+  "version": "5.1.9",
   "repository": {
     "type": "git",
     "url": "git://github.com/isaacs/minimatch.git"