Remote code execution in Apple Safari



| Updated: 2021-11-01
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-30858
CWE-ID CWE-416
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Apple Safari
Client/Desktop applications / Web browsers

Vendor Apple Inc.

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU56475

Risk: Critical

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2021-30858

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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 trick the victim to visit a specially crafted web page, 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.

Note, the vulnerability is being actively exploited in-the-wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Apple Safari: 14.0 - 14.1.2

CPE2.3 External links

https://support.apple.com/en-us/HT212808


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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