Integer overflow in QEMU - CVE-2020-11869
Published: May 5, 2020
Vulnerability identifier: #VU27543
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-11869
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow within the implementation of ATI VGA emulation in ati_2d_blt() routine in hw/display/ati-2d.c while handling MMIO write operations through the ati_mm_write() callback.. A remote attacker on the guest operating system can abuse this flaw to crash the QEMU process, resulting in a denial of service.
Affected software
QEMU
qemu (Ubuntu package)
qemu (Ubuntu package)
How to mitigate CVE-2020-11869
Install updates from vendor's website.
QEMU - update to 4.2.1
qemu (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.44, 1:2.11+dfsg-1ubuntu7.26, 1:4.0+dfsg-0ubuntu9.6, 1:4.2-3ubuntu6.1
qemu (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.44, 1:2.11+dfsg-1ubuntu7.26, 1:4.0+dfsg-0ubuntu9.6, 1:4.2-3ubuntu6.1