Remote code execution in Apple Safari



Published: 2021-09-13 | 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
Subscribe
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

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

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, 14.0.1, 14.0.2, 14.0.3, 14.0.3-14610.4.3.1.7, 14.0.3-15610.4.3.1.7, 14.1, 14.1 14611.1.21.161.7, 14.1 15611.1.21.161.7, 14.1.1, 14.1.2

CPE2.3 External links

http://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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