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Ubuntu Security Notice USN-6954-1
August 13, 2024

qemu vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in QEMU.

Software Description:

• qemu: Machine emulator and virtualizer

Details:

Markus Frank and Fiona Ebner discovered that QEMU did not properly
handle certain memory operations, leading to a NULL pointer dereference.
An authenticated user could potentially use this issue to cause a denial
of service. (CVE-2023-6683)

Xiao Lei discovered that QEMU did not properly handle certain memory
operations when specific features were enabled, which could lead to a
stack overflow. An attacker could potentially use this issue to leak
sensitive information. (CVE-2023-6693)

It was discovered that QEMU had an integer underflow vulnerability in
the TI command, which would result in a buffer overflow. An attacker
could potentially use this issue to cause a denial of service.
(CVE-2024-24474)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
qemu-system 1:6.2+dfsg-2ubuntu6.22
qemu-system-arm 1:6.2+dfsg-2ubuntu6.22
qemu-system-mips 1:6.2+dfsg-2ubuntu6.22
qemu-system-misc 1:6.2+dfsg-2ubuntu6.22
qemu-system-ppc 1:6.2+dfsg-2ubuntu6.22
qemu-system-s390x 1:6.2+dfsg-2ubuntu6.22
qemu-system-sparc 1:6.2+dfsg-2ubuntu6.22
qemu-system-x86-xen 1:6.2+dfsg-2ubuntu6.22

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6954-1
CVE-2023-6683, CVE-2023-6693, CVE-2024-24474

Package Information:
https://launchpad.net/ubuntu/+source/qemu/1:6.2+dfsg-2ubuntu6.22