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CVE-2021-3527

Description

A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.

Risk Information

Base Score
5.5
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
Exploitation Probability
0.028

Associated Vulnerability

VulnerabilityOS Platform
Vulnerability CVE-2021-20255,CVE-2021-3527 are affected in QEMU 2020Windows
Machine emulator and virtualizer (USN-5010-1) qemu_5.0-5ubuntu9.9_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu_4.2-3ubuntu6.17_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu_5.2+dfsg-9ubuntu3.1_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu_2.11+dfsg-1ubuntu7.37_i386.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu_2.11+dfsg-1ubuntu7.37_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system_5.0-5ubuntu9.9_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system_4.2-3ubuntu6.17_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system_5.2+dfsg-9ubuntu3.1_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system_2.11+dfsg-1ubuntu7.37_i386.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system_2.11+dfsg-1ubuntu7.37_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system-x86_5.0-5ubuntu9.9_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system-x86_4.2-3ubuntu6.17_amd64.debLinux
Machine emulator and virtualizer (USN-5010-1) qemu-system-x86_5.2+dfsg-9ubuntu3.1_amd64.debLinux
Qemu update (ELSA-2021-9425) qemu-4.2.1-11.el7.x86_64.rpmLinux
Qemu-block-gluster update (ELSA-2021-9425) qemu-block-gluster-4.2.1-11.el7.x86_64.rpmLinux
Qemu-block-iscsi update (ELSA-2021-9425) qemu-block-iscsi-4.2.1-11.el7.x86_64.rpmLinux
Qemu-block-rbd update (ELSA-2021-9425) qemu-block-rbd-4.2.1-11.el7.x86_64.rpmLinux
Qemu-common update (ELSA-2021-9425) qemu-common-4.2.1-11.el7.x86_64.rpmLinux
Qemu-img update (ELSA-2021-9425) qemu-img-4.2.1-11.el7.x86_64.rpmLinux
Qemu-kvm update (ELSA-2021-9425) qemu-kvm-4.2.1-11.el7.x86_64.rpmLinux
Qemu-kvm-core update (ELSA-2021-9425) qemu-kvm-core-4.2.1-11.el7.x86_64.rpmLinux
Qemu-system-x86 update (ELSA-2021-9425) qemu-system-x86-4.2.1-11.el7.x86_64.rpmLinux
Qemu-system-x86-core update (ELSA-2021-9425) qemu-system-x86-core-4.2.1-11.el7.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-alsa-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-alsa-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-oss-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-oss-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-pa-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-pa-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-sdl-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-audio-sdl-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-curl-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-curl-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-iscsi-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-iscsi-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-rbd-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-rbd-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-ssh-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-block-ssh-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-debugsource-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-guest-agent-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-guest-agent-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ipxe-1.0.0+-57.2.noarch.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-kvm-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-lang-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-seabios-1.12.0_0_ga698c89-57.2.noarch.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-sgabios-8-57.2.noarch.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-tools-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-tools-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ui-curses-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ui-curses-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ui-gtk-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ui-gtk-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ui-sdl-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-ui-sdl-debuginfo-3.1.1.1-57.2.x86_64.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-vgabios-1.12.0_0_ga698c89-57.2.noarch.rpmLinux
SUSE-SU-2021:2813-1(SUSE Linux Enterprise Server 12-SP5 ) qemu-x86-3.1.1.1-57.2.x86_64.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234