QEMU up to 5.1.x USB Emulator do_token_in/do_token_out data_buf out-of-bounds

Summaryinfo

A vulnerability marked as critical has been reported in QEMU up to 5.1.x. This vulnerability affects the function do_token_in/do_token_out of the component USB Emulator. The manipulation of the argument data_buf as part of Packet leads to out-of-bounds. This vulnerability is listed as CVE-2020-14364. The attack must be carried out locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU up to 5.1.x (Virtualization Software) and classified as critical. This issue affects the function do_token_in/do_token_out of the component USB Emulator. The manipulation of the argument data_buf as part of a Packet leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.

The weakness was presented 08/31/2020 as Bug 1869201 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2020-14364 since 06/17/2020. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 208578 (CentOS 7 : qemu-kvm-ma (RHSA-2020:4078)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.2.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208578). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Virtualization Software

Name

• QEMU

Version

• 5.0
• 5.1

License

• open-source

Website

• Product: https://www.qemu.org/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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