Privilege escalation in Apple iOS and iPadOS

1) Buffer overflow

EUVDB-ID: #VU55316

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-30807

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to a boundary within the IOMobileFrameBuffer subsystem. A local application can trigger memory corruption and execute arbitrary code on the target system with kernel privileges.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

iPadOS: 14.0 18A373 - 14.7 18G70

Apple iOS: 14.0 18A373 - 14.7 18G69

CPE2.3

• cpe:2.3:o:apple:ipados:14.7:18G70:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.0.1:18A393:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.1:18A8395:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.2.1:18B121:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.3:18C66:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.4.2:18D70:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.5.1:18E212:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.6:18F72:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.7:18G69:*:*:*:*:*:

External links

http://support.apple.com/en-us/HT212623

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.