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CVE-2021-3607

Published: 18 June 2021

An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Priority

Low

Cvss 3 Severity Score

6.0

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal
Released (1:4.2-3ubuntu6.17)
groovy
Released (1:5.0-5ubuntu9.9)
hirsute
Released (1:5.2+dfsg-9ubuntu3.1)
trusty Not vulnerable
(code not present)
upstream Needs triage

impish
Released (1:6.0+dfsg-2expubuntu1)
jammy
Released (1:6.0+dfsg-2expubuntu1)
xenial Not vulnerable
(code not present)
Patches:
upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=32e5703cfea07c91e6e84bcb0313f633bb146534

Severity score breakdown

Parameter Value
Base score 6.0
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H