Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Fastly | Js-Compute | < 0.5.3 |
Related Weaknesses (CWE)
References
- https://github.com/fastly/js-compute-runtime/security/advisories/GHSA-cmr8-5w4c-Third Party Advisory
- https://github.com/fastly/js-compute-runtime/security/advisories/GHSA-cmr8-5w4c-Third Party Advisory
FAQ
What is CVE-2022-39218?
CVE-2022-39218 is a vulnerability with a CVSS score of 7.5 (HIGH). 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` a...
How severe is CVE-2022-39218?
CVE-2022-39218 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-39218?
Check the references section above for vendor advisories and patch information. Affected products include: Fastly Js-Compute.