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Bug 810544 (CVE-2021-3713) - app-emulation/qemu: buffer overread (CVE-2021-3713)
Summary: app-emulation/qemu: buffer overread (CVE-2021-3713)
Status: CONFIRMED
Alias: CVE-2021-3713
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
URL: https://bugzilla.redhat.com/show_bug....
Whiteboard: B4 [ebuild]
Keywords:
Depends on:
Blocks:
 
Reported: 2021-08-26 21:28 UTC by John Helmert III
Modified: 2021-08-26 21:31 UTC (History)
3 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description John Helmert III gentoo-dev Security 2021-08-26 21:28:35 UTC
CVE-2021-3713:

An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host.


Seems like this is just an OOB access: https://lists.nongnu.org/archive/html/qemu-devel/2021-08/msg03581.html
Patch: https://lists.nongnu.org/archive/html/qemu-devel/2021-08/msg02766.html

Not sure if it's made it into version control/any release yet.
Comment 1 Sam James archtester gentoo-dev Security 2021-08-26 21:31:34 UTC
https://lists.nongnu.org/archive/html/qemu-devel/2021-08/msg03588.html suggests it's not in 6.1