Use After Free Affecting qemu package, versions <1:7.0+dfsg-1
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Test your applications- Snyk ID SNYK-DEBIAN12-QEMU-1579741
- published 2 Sep 2021
- disclosed 2 May 2022
Introduced: 2 Sep 2021
CVE-2021-3750 Open this link in a new tabHow to fix?
Upgrade Debian:12
qemu
to version 1:7.0+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu
package and not the qemu
package as distributed by Debian
.
See How to fix?
for Debian:12
relevant fixed versions and status.
A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.
References
- https://security-tracker.debian.org/tracker/CVE-2021-3750
- https://gitlab.com/qemu-project/qemu/-/issues/556
- https://bugzilla.redhat.com/show_bug.cgi?id=1999073
- https://gitlab.com/qemu-project/qemu/-/issues/541
- https://security.netapp.com/advisory/ntap-20220624-0003/
- https://security.gentoo.org/glsa/202208-27
- https://access.redhat.com/errata/RHSA-2022:7967
- https://access.redhat.com/security/cve/CVE-2021-3750