CVE-2022-39218
HIGHDescription
The JS Compute Runtime for Fastly's Compute@Edge platform provides the environment JavaScript is executed in when using the Compute@Edge JavaScript SDK. In versions prior to 0.5.3, the `Math.random` and `crypto.getRandomValues` methods fail to use sufficiently random values. The initial value to seed the PRNG (pseudorandom number generator) is baked-in to the final WebAssembly module, making the sequence of random values for that specific WebAssembly module predictable. An attacker can use the fixed seed to predict random numbers generated by these functions and bypass cryptographic security controls, for example to disclose sensitive data encrypted by functions that use these generators. The problem has been patched in version 0.5.3. No known workarounds exist.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 53% of all known CVEs.
References
Related Vulnerabilities
Other CWE-335 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2018-14647 | High | 7.5 | 11% | - | Fix |
| CVE-2018-12520 | High | 8.1 | 11% | - | Fix |
| CVE-2016-10180 | High | 7.5 | 4.4% | - | - |
| CVE-2021-27211 | High | 7.5 | 3.3% | - | - |
| CVE-2021-41117 | High | 8.7 | 3.1% | - | Fix |
| CVE-2017-11519 | Critical | 9.8 | 3.1% | - | - |
Common questions
How do I fix CVE-2022-39218?
Upgrade js-compute to 0.5.3 or later.
Is CVE-2022-39218 being actively exploited?
Not that we know of. CVE-2022-39218 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.80% is the estimated probability that it will be exploited in the next 30 days. That is higher than 53% of all scored CVEs.
How severe is CVE-2022-39218?
CVE-2022-39218 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2022-39218 affect?
Published advisories record a fix for js-compute (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.