KLA12215 Multiple vulnerabilities in Opera

Multiple vulnerabilities were found in Opera. Malicious users can exploit these vulnerabilities to execute arbitrary code, cause denial of service.

Below is a complete list of vulnerabilities:

1. A use after free vulnerability in WebGL can be exploited to cause denial of service or execute arbitrary code.
2. A use after free vulnerability in TabGroups can be exploited to cause denial of service or execute arbitrary code.
3. A use after free vulnerability in WebAudio can be exploited to cause denial of service or execute arbitrary code.
4. A use after free vulnerability in Sharing can be exploited to cause denial of service or execute arbitrary code.

Original advisories

Changelog for Opera 77

Stable Channel Update for Desktop

Related products

Opera

CVE list

CVE-2021-30556 critical

CVE-2021-30555 critical

CVE-2021-30554 critical

CVE-2021-30557 critical

Solution

Update to the latest version

Download Opera

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• DoS

Denial of service. Exploitation of vulnerabilities with this impact can lead to loss of system availability or critical functional fault.

• SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

Affected Products

• Opera earlier than 77.0.4054.146