#VU23052 Out-of-bounds read in tvOS - CVE-2019-8831

Vulnerability identifier: #VU23052

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-8831

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
tvOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

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

The vulnerability exists due to a boundary condition within the UIFoundation module. A local attacker can trick a victim to visit a malicious page or open a malicious file, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

tvOS: 4.4.11 - 4.4.12, 5.0.2 - 5.0.3, 9.0 - 9.3.3, 10.0 - 10.2, 11 - 11.4.1, 12 - 12.4.1

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External links
https://www.zerodayinitiative.com/advisories/ZDI-19-995/
https://support.apple.com/en-us/HT210604
https://support.apple.com/en-us/HT210604

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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?

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