Out-of-bounds read in Apple tvOS

1) Out-of-bounds read

EUVDB-ID: #VU23052

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8831

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

Exploit availability: No

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 - 12.4.1

External links

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

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.