Vulnerability identifier: #VU31805
Vulnerability risk: Medium
CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID:
CWE-ID:
CWE-617
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
QEMU
Client/Desktop applications /
Virtualization software
Vendor: QEMU
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion in the Network Block Device(NBD) Server. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
QEMU: 0.1 - 5.0.0
External links
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761
http://www.openwall.com/lists/oss-security/2020/06/09/1
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.