SB2021022602 - Improperly implemented security check for standard in firefox-esr (Alpine package)
Published: February 26, 2021
Security Bulletin ID
SB2021022602
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 security vulnerability.
1) Improperly implemented security check for standard (CVE-ID: CVE-2021-23968)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect implementation of W3C Content Security Policy. If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. A remote attacker can gain knowledge of sensitive information contained in such URIs.Remediation
Install update from vendor's website.