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GHSA-g3hv-75wg-m249
minimatchminimatch 10.2.6 contains an attacker-controlled pattern amplification in firstPhasePreProcess() when optimizationLevel >= 2.
researcher: Reid Downing (b1nv0id) files:
- src/index.ts: 690-770
- src/index.ts: 780-796
issue: input-controlled growth of globParts during first-phase preprocessing, followed by quadratic second-phase processing.
the **/../ transformation clones a globparts entry and appends the clone to the same globparts array:
parts.splice(gs, 1)
const other = parts.slice(0)
other[gs] = '**'
globParts.push(other)
this occurs inside a do...while (didSomething) fixpoint loop, allowing generated entries to be processed again.
the expanded globparts array is subsequently processed by secondPhasePreProcess(), which performs pairwise comparisons:
for (let i = 0; i < globParts.length - 1; i++) {
for (let j = i + 1; j < globParts.length; j++) {
this.partsMatch(...)
}
}
an attacker who can supply a glob pattern can therefore cause additional pattern entries to be generated during preprocessing, followed by quadratic pairwise processing, resulting in excessive cpu and memory consumption.
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The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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