#VU75313 Out-of-bounds read in Oracle VM VirtualBox - CVE-2023-21991

Vulnerability identifier: #VU75313

Vulnerability risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-21991

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Oracle VM VirtualBox
Server applications / Virtualization software

Vendor: Oracle

Description

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

The vulnerability exists due to a boundary condition within the handling of VGA MMIO. A local privileged user can trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Oracle VM VirtualBox: 6.1.0 - 6.1.43, 7.0.0 - 7.0.6

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External links
https://www.oracle.com/security-alerts/cpuapr2023.html
https://www.zerodayinitiative.com/advisories/ZDI-23-483/

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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.