CVE-2021-3682
Published: 5 August 2021
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
bionic |
Released
(1:2.11+dfsg-1ubuntu7.39)
|
| focal |
Released
(1:4.2-3ubuntu6.21)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Released
(1:6.0+dfsg-2expubuntu1.2)
|
|
| jammy |
Released
(1:6.2+dfsg-2ubuntu5)
|
|
| kinetic |
Released
(1:6.2+dfsg-2ubuntu5)
|
|
| trusty |
Released
(2.0.0+dfsg-2ubuntu1.47+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Needs triage
|
|
| xenial |
Released
(1:2.5+dfsg-5ubuntu10.51+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://gitlab.com/qemu-project/qemu/-/commit/5e796671e6b8d5de4b0b423dce1b3eba144a92c9 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.5 |
| 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 |