CVE-2021-23438
A type confusion vulnerability can lead to a bypass of CVE-2018-16490.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
This affects the package mpath before 0.8.4. A type confusion vulnerability can lead to a bypass of CVE-2018-16490. In particular, the condition ignoreProperties.indexOf(parts[i]) !== -1 returns -1 if parts[i] is ['__proto__']. This is because the method that has been called if the input is an array is Array.prototype.indexOf() and not String.prototype.indexOf(). They behave differently depending on the type of the input.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.72% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-843
- Affected
- mpath project/mpath
- Source
- report@snyk.io
References
- https://github.com/aheckmann/mpath/commit/89402d2880d4ea3518480a8c9847c541f2d824fcPatch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579548Exploit, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-MPATH-1577289Exploit, Third Party Advisory
- https://github.com/aheckmann/mpath/commit/89402d2880d4ea3518480a8c9847c541f2d824fcPatch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579548Exploit, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-MPATH-1577289Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.