Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-20221 |
CWE-ID | CWE-125 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
QEMU Client/Desktop applications / Virtualization software |
Vendor | QEMU |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU54317
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-20221
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform DoS attack.
The vulnerability exists due to an out-of-bounds heap buffer access in the ARM Generic Interrupt Controller emulator of QEMU. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
MitigationInstall updates from vendor's website.
Vulnerable software versionsQEMU: 4.0.0 - 4.2.0
External linkshttp://lists.debian.org/debian-lts-announce/2021/02/msg00024.html
http://bugzilla.redhat.com/show_bug.cgi?id=1924601
http://www.openwall.com/lists/oss-security/2021/02/05/1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to open a a specially crafted file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.