CVE-2021-20257

medium

Description

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

References

https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html

https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8

https://bugzilla.redhat.com/show_bug.cgi?id=1930087

https://www.openwall.com/lists/oss-security/2021/02/25/2

https://security.netapp.com/advisory/ntap-20220425-0003/

Details

Source: MITRE

Published: 2022-03-16

Updated: 2022-05-12

Type: CWE-835

Risk Information

CVSS v2

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Impact Score: 4

Exploitability Score: 2

Severity: MEDIUM