SB2021090929 - Ubuntu update for firefox
Published: September 9, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Security restrictions bypass (CVE-ID: CVE-2021-38491)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to Mixed-Content-Blocking was unable to check opaque origins. As a result, the mixed-content checks were unable to analyze opaque origins which led to some mixed content being loaded.
2) Buffer overflow (CVE-ID: CVE-2021-38493)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Buffer overflow (CVE-ID: CVE-2021-38494)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.