CVE-2022-30634 — Infinite loop in Read in crypto/rand before Go 1

Infinite loop in Read in crypto/rand before Go 1.17.11 and Go 1.18.3 on Windows allows attacker to cause an indefinite hang by passing a buffer larger than 1 << 32 - 1 bytes.

01What is this vulnerability?

Infinite loop in Read in crypto/rand before Go 1.17.11 and Go 1.18.3 on Windows allows attacker to cause an indefinite hang by passing a buffer larger than 1 << 32 - 1 bytes.

02Affected products

Vendor	Product	Versions
Go standard library	crypto/rand	0, 1.18.0-0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-07-15T19:36:19.000Z
• Last modified: 2024-08-03T06:56:13.255Z

09References

• go.dev — https://go.dev/cl/402257
• go.googlesource.com — https://go.googlesource.com/go/+/bb1f4416180511231de6d17a1f2f55c82aafc863
• go.dev — https://go.dev/issue/52561
• groups.google.com — https://groups.google.com/g/golang-announce/c/TzIC9-t8Ytg/m/IWz5T6x7AAAJ
• pkg.go.dev — https://pkg.go.dev/vuln/GO-2022-0477