QEMU 4.2.0 MSI-X MMIO hw/pci/msix.c memory corruption

Summaryinfo

A vulnerability classified as critical has been found in QEMU 4.2.0. Affected by this issue is some unknown functionality of the file hw/pci/msix.c of the component MSI-X MMIO. This manipulation causes memory corruption. The identification of this vulnerability is CVE-2020-13754. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability was found in QEMU 4.2.0 (Virtualization Software). It has been declared as critical. Affected by this vulnerability is some unknown processing of the file hw/pci/msix.c of the component MSI-X MMIO. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address in an msi-x mmio operation.

The weakness was shared 06/02/2020 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2020-13754 since 06/01/2020. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/26/2024).

The vulnerability scanner Nessus provides a plugin with the ID 209571 (Oracle Linux 8 : virt:kvm_utils3 (ELSA-2024-12792)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (209571). The entry VDB-155958 is related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Virtualization Software

Name

• QEMU

Version

• 4.2.0

License

• open-source

Website

• Product: https://www.qemu.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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