Division by zero in QEMU - CVE-2020-14415
Published: September 7, 2020
Vulnerability identifier: #VU46316
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-14415
CWE-ID: CWE-369
Exploitation vector: Adjecent network
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 division by zero error within the oss_write() function in audio/ossaudio.c in QEMU. A remote user can run a specially crafted application to trigger the error and perform a denial if service (DoS) attack.
Affected software
QEMU
Ubuntu
qemu-system-ppc (Ubuntu package)
qemu-system-aarch64 (Ubuntu package)
qemu-system-x86 (Ubuntu package)
qemu-system-sparc (Ubuntu package)
qemu-system-s390x (Ubuntu package)
qemu-system-mips (Ubuntu package)
qemu-system-arm (Ubuntu package)
qemu (Ubuntu package)
qemu-system (Ubuntu package)
qemu-system-x86-microvm (Ubuntu package)
qemu-system-x86-xen (Ubuntu package)
Ubuntu
qemu-system-ppc (Ubuntu package)
qemu-system-aarch64 (Ubuntu package)
qemu-system-x86 (Ubuntu package)
qemu-system-sparc (Ubuntu package)
qemu-system-s390x (Ubuntu package)
qemu-system-mips (Ubuntu package)
qemu-system-arm (Ubuntu package)
qemu (Ubuntu package)
qemu-system (Ubuntu package)
qemu-system-x86-microvm (Ubuntu package)
qemu-system-x86-xen (Ubuntu package)
How to mitigate CVE-2020-14415
Install updates from vendor's website.
QEMU - update to 5.0.0
qemu-system-ppc (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-aarch64 (Ubuntu package) - update to 1:2.5+dfsg-5ubuntu10.45
qemu-system-x86 (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-sparc (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-s390x (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-mips (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-arm (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:4.2-3ubuntu6.4
qemu (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-x86-microvm (Ubuntu package) - update to 1:4.2-3ubuntu6.4
qemu-system-x86-xen (Ubuntu package) - update to 1:4.2-3ubuntu6.4
qemu-system-ppc (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-aarch64 (Ubuntu package) - update to 1:2.5+dfsg-5ubuntu10.45
qemu-system-x86 (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-sparc (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-s390x (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-mips (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-arm (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:4.2-3ubuntu6.4
qemu (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system (Ubuntu package) - addressed in versions 1:2.5+dfsg-5ubuntu10.45, 1:2.11+dfsg-1ubuntu7.31, 1:4.2-3ubuntu6.4
qemu-system-x86-microvm (Ubuntu package) - update to 1:4.2-3ubuntu6.4
qemu-system-x86-xen (Ubuntu package) - update to 1:4.2-3ubuntu6.4