#VU6112 Integer overflow in Apple iOS - CVE-2011-0226

Vulnerability identifier: #VU6112

Vulnerability 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-2011-0226

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apple iOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when handling of Type 1 fonts by FreeType. A remote attacker can send a specially crafted PDF file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation
Update iOS to version 4.3.4.

Vulnerable software versions

Apple iOS: 3.0 - 3.0.1, 3.1 - 3.1.3, 3.2 - 3.2.2, 4.0 - 4.0.2, 4.1, 4.2.1 - 4.2.8, 4.3.0 - 4.3.4

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External links
https://support.apple.com/en-us/HT202272

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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. However, a fully functional exploit for this vulnerability is available.