SB2020092919 - Improper Verification of Cryptographic Signature in gosaml2
Published: September 29, 2020 Updated: April 28, 2026
Security Bulletin ID
SB2020092919
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2020-15216)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to bypass authentication.
The vulnerability exists due to improper signature verification in SAML response validation when processing a valid signed SAML response. A remote attacker can modify the document to bypass authentication.
An expired signed SAML response may be sufficient for exploitation.
Remediation
Install update from vendor's website.