SB2021072215 - Multiple vulnerabilities in Apple Safari

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Type Confusion (CVE-ID: CVE-2021-30758)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a type confusion error in WebKit. A remote attacker can trick the victim to open a specially crafted website, trigger a type confusion error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Use-after-free (CVE-ID: CVE-2021-30795)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing HTML content in WebKit. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

3) Input validation error (CVE-ID: CVE-2021-30797)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input in WebKit. A remote attacker can trick the victim to visit a specially crafted website and execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References

• https://support.apple.com/en-us/HT212606