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CVE-2021-3682

Publication date 5 August 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.5 · High

Score breakdown

A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.

Status

Package Ubuntu Release Status
qemu 22.10 kinetic
Fixed 1:6.2+dfsg-2ubuntu5
22.04 LTS jammy
Fixed 1:6.2+dfsg-2ubuntu5
21.10 impish
Fixed 1:6.0+dfsg-2expubuntu1.2
21.04 hirsute Ignored
20.04 LTS focal
Fixed 1:4.2-3ubuntu6.21
18.04 LTS bionic
Fixed 1:2.11+dfsg-1ubuntu7.39
16.04 LTS xenial
14.04 LTS trusty

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu

Severity score breakdown

Parameter Value
Base score 8.5 · High
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references