KLA12209 Multiple vulnerabilities in Opera

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

Below is a complete list of vulnerabilities:

1. A type confusion vulnerability in V8 can be exploited to cause denial of service.
2. A use after free vulnerability in Spell check can be exploited to cause denial of service or execute arbitrary code.
3. A use after free vulnerability in Network service can be exploited to cause denial of execute arbitrary code.
4. A use after free vulnerability in Accessibility can be exploited to cause denial of execute arbitrary code.
5. A use after free vulnerability in Loader can be exploited to cause denial of service or cause denial of service.
6. A use after free vulnerability in Extensions can be exploited to cause denial of service or execute arbitrary code.
7. A use after free vulnerability in BFCache can be exploited to cause denial of service or execute arbitrary code.
8. An out of bounds write vulnerability in ANGLE can be exploited to cause denial of service or execute arbitrary code.
9. A use after free vulnerability in Extensions can be exploited to cause denial of execute arbitrary code.
10. A use after free vulnerability in Autofill can be exploited to cause denial of service or execute arbitrary code.

Original advisories

Changelog for Opera 77

Stable Channel Update for Desktop

Exploitation

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Related products

Opera

CVE list

CVE-2021-30545 critical

CVE-2021-30550 critical

CVE-2021-30546 critical

CVE-2021-30549 critical

CVE-2021-30551 critical

CVE-2021-30547 critical

CVE-2021-30553 critical

CVE-2021-30552 critical

CVE-2021-30548 critical

CVE-2021-30544 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.

Affected Products

• Opera earlier than 77.0.4054.90