Privilege escalation in Apple iOS and iPadOS

1) Integer overflow

EUVDB-ID: #VU57217

Risk: High

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

CVE-ID: CVE-2021-30883

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error within the IOMobileFrameBuffer subsystem. A malicious application can trigger integer overflow and execute arbitrary code on with kernel privileges.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apple iOS: 14.0 18A373 - 15.0.1 19A348

iPadOS: 14.0 18A373 - 15.0.1 19A348

CPE2.3

• 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:14.7.1:18G82:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:14.8:18H17:*:*:*:*:*:
• cpe:2.3:o:apple:apple_ios:15.0.1:19A348:*:*:*:*:*:
• cpe:2.3:o:apple:ipados:14.8:18H17:*:*:*:*:*:

External links

http://support.apple.com/en-us/HT212846

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.