Vulnerability identifier: #VU27544

Vulnerability risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11102

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

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

The vulnerability exists due to a boundary within hw/net/tulip.c in QEMU during the copying of tx/rx buffers because the frame size is not validated against the r/w data length. A remote attacker can  trigger memory corruption and execute arbitrary code on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 4.2.0

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External links
http://www.openwall.com/lists/oss-security/2020/04/06/1
http://lists.gnu.org/archive/html/qemu-devel/2020-03/msg08322.html

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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.