Use After Free Affecting qemu-kvm-block-curl package, versions <17:7.0.0-13.el9
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Test your applications- Snyk ID SNYK-ALMALINUX9-QEMUKVMBLOCKCURL-5657046
- published 28 May 2023
- disclosed 14 Nov 2023
Introduced: 28 May 2023
CVE-2021-3750 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 qemu-kvm-block-curl to version 17:7.0.0-13.el9 or higher.
This issue was patched in ALSA-2022:7967.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu-kvm-block-curl package and not the qemu-kvm-block-curl package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 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://errata.almalinux.org/9/ALSA-2022-7967.html
- https://errata.almalinux.org/8/ALSA-2023-6980.html
- https://access.redhat.com/security/cve/CVE-2021-3750
- https://access.redhat.com/errata/RHSA-2022:7967
- https://access.redhat.com/errata/RHSA-2023:6980
- https://bugzilla.redhat.com/show_bug.cgi?id=1999073
- https://gitlab.com/qemu-project/qemu/-/issues/541
- https://gitlab.com/qemu-project/qemu/-/issues/556
- https://security.gentoo.org/glsa/202208-27
- https://security.netapp.com/advisory/ntap-20220624-0003/