QEMU 4.1.0 hw/core/loader.c rom_copy memory corruption

Summaryinfo

A vulnerability classified as critical was found in QEMU 4.1.0. The affected element is the function rom_copy of the file hw/core/loader.c. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2020-13765. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability was found in QEMU 4.1.0 (Virtualization Software). It has been declared as critical. This vulnerability affects the function rom_copy of the file hw/core/loader.c. 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. CVE summarizes:

rom_copy() in hw/core/loader.c in QEMU 4.1.0 does not validate the relationship between two addresses, which allows attackers to trigger an invalid memory copy operation.

The weakness was shared 06/04/2020 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2020-13765 since 06/02/2020. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (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 entries VDB-156187 and VDB-156186 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Virtualization Software

Name

• QEMU

Version

• 4.1.0

License

• open-source

Website

• Product: https://www.qemu.org/

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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