#VU31807 Out-of-bounds read in QEMU - CVE-2020-13791

Vulnerability identifier: #VU31807

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-13791

CWE-ID: CWE-125

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

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

The vulnerability exists due to a boundary condition in hw/pci/pci.c. A local user on the guest operating system can trigger out-of-bounds read error by providing an address near the end of the PCI configuration space and read contents of memory on the system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

QEMU: 4.1.0 - 5.0.0

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External links
https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg00706.html
https://security.netapp.com/advisory/ntap-20200717-0001/
https://www.openwall.com/lists/oss-security/2020/06/04/1

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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