QEMU 4.2.0 hw/net/tulip.c buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in QEMU 4.2.0. This issue affects some unknown processing of the file hw/net/tulip.c. The manipulation leads to buffer overflow. This vulnerability is listed as CVE-2020-11102. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in QEMU 4.2.0 (Virtualization Software). It has been rated as critical. This issue affects an unknown functionality of the file hw/net/tulip.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

hw/net/tulip.c in QEMU 4.2.0 has a buffer overflow during the copying of tx/rx buffers because the frame size is not validated against the r/w data length.

The weakness was presented 04/06/2020 (oss-sec). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2020-11102 since 03/30/2020. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k 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). 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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CPE 2.2info

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

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