USN-6954-1: QEMU vulnerabilities

Releases

• Ubuntu 22.04 LTS

Packages

• 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

• 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

• CVE-2023-6693
• CVE-2023-6683
• CVE-2024-24474