Information disclosure in Apple macOS

1) Out-of-bounds read

EUVDB-ID: #VU55253

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-30764

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the ImageIO framework. A remote attacker can create a specially crafted WEBP file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

macOS: 10.14 18A391 - 11.5 20G71

CPE2.3

• cpe:2.3:o:apple:macos:10.14:18A391:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.1:18B75:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.1:18B2107:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.1:18B3094:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.2:18C54:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.3:18D42:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.3:18D43:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.3:18D109:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.4:18E226:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:10.14.4:18E227:*:*:*:*:*:*

External links

https://www.zerodayinitiative.com/advisories/ZDI-21-893/

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.