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Improper Verification of Cryptographic Signature in golang.org/x/crypto

High severity GitHub Reviewed Published May 18, 2021 to the GitHub Advisory Database • Updated Feb 16, 2023

Package

gomod golang.org/x/crypto (Go)

Affected versions

< 0.0.0-20200220183623-bac4c82f6975

Patched versions

0.0.0-20200220183623-bac4c82f6975

Description

golang.org/x/crypto before v0.0.0-20200220183623-bac4c82f6975 for Go allows a panic during signature verification in the golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client.

References

Published by the National Vulnerability Database Feb 20, 2020
Reviewed May 17, 2021
Published to the GitHub Advisory Database May 18, 2021
Last updated Feb 16, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

26.317%
(97th percentile)

Weaknesses

CVE ID

CVE-2020-9283

GHSA ID

GHSA-ffhg-7mh4-33c4

Source code

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