vm2: Modification of Assumed-Immutable Data (MAID)
CVE-2022-25893 is a critical-severity modification of assumed-immutable data (MAID) vulnerability in vm2, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 3.9.10 as the first without the flaw, so updating vm2 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.54% chance of exploitation within 30 days, higher than 75% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update vm2 to 3.9.10 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | CNA (snyk.io) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
The package vm2 before 3.9.10 are vulnerable to Arbitrary Code Execution due to the usage of prototype lookup for the WeakMap.prototype.set method. Exploiting this vulnerability leads to access to a host object and a sandbox compromise.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Modification of Assumed-Immutable Data (MAID)
The product does not properly protect an assumed-immutable element from being modified by an attacker.
How developers prevent this class of flaw
- When the data is stored or transmitted through untrusted sources that could modify the data, implement integrity checks to detect unauthorized modification, or store/transmit the data in a trusted location that is free from external influence.
More Modification of Assumed-Immutable Data (MAID) vulnerabilities (CWE-471)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- github.com/patriksimek/vm2/pull/445Third Party Advisory
- github.com/patriksimek/vm2/pull/445/commits/3a9876482be487b78a90ac459675da7f83f46d69Third Party Advisory
- security.snyk.io/vuln/SNYK-JS-VM2-2990237Exploit, Third Party Advisory
Technical write-ups (may include proof of concept)
- github.com/patriksimek/vm2/issues/444Exploit, Issue Tracking, Third Party Advisory
Recent Modification of Assumed-Immutable Data (MAID) vulnerabilities
- 8.4 High severity
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