SB20200930109 - Authentication bypass in jwt-go
Published: September 30, 2020 Updated: February 18, 2021
Security Bulletin ID
SB20200930109
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2020-26160)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to improper validation when processing data passed via m["aud"]. A remote attacker can pass the []string{} string, which is allowed by the specification, however treated as an empty string and bypass authentication checks.
Remediation
Install update from vendor's website.