Denial of service in Linux kernel KVM

1) Resource management error

EUVDB-ID: #VU26992

Risk: Medium

CVSSv4.0: 4.9 [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/E:U/U:Green]

CVE-ID: CVE-2020-11669

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management issue. A local user of guest operating system can perform a denial of service attack against the POWER9 KVM host.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.14 - 5.1.21

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.19.115:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.0.21:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.1.21:*:*:*:*:*:*:*

External links

https://www.openwall.com/lists/oss-security/2020/04/15/1
https://www.openwall.com/lists/oss-security/2020/04/15/2
https://www.openwall.com/lists/oss-security/2020/04/16/2
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=53a712bae5dd919521a58d7bad773b949358add0
https://github.com/torvalds/linux/commit/53a712bae5dd919521a58d7bad773b949358add0
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.116
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.177

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.