🛡️ CVE-2020-29652 — crypto

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-476 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

golang.org/x/crypto/ssh NULL Pointer Dereference vulnerability

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. An attacker can craft an authentication request message for the gssapi-with-mic method which will cause NewServerConn to panic via a nil pointer dereference if ServerConfig.GSSAPIWithMICConfig is nil.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2020-29652 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

CVE-2020-29652 is recorded against 1 package.

  • golang.org/x/crypto

Timeline and source

Published on 24 May 2022 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
go-review.googlesource.com (Web)
go.dev (Web)
go.googlesource.com (Web)
groups.google.com (Web)
lists.apache.org (Web)
pkg.go.dev (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-476
Public Exploit ✅ No
Source OSV
Published 2022-05-24
Updated 2026-08-12
Modified 2026-02-04

Affected Packages

Software From version Fixed in
golang.org/x/crypto — —

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