Vulnerability identifier: #VU28410
Vulnerability risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Local network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The ioapic_read_indirect function in virt/kvm/ioapic.c in the Linux kernel through 3.8.4 does not properly handle a certain combination of invalid IOAPIC_REG_SELECT and IOAPIC_REG_WINDOW operations, which allows guest OS users to obtain sensitive information from host OS memory or cause a denial of service (host OS OOPS) via a crafted application.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 4.19 - 4.19.102, 4.9 - 4.9.213, 4.14 - 4.14.170, 5.0 - 5.0.21, 5.1 - 5.1.21, 5.2 - 5.2.21, 5.3 - 5.3.18, 5.4 - 5.4.42, 5.5 - 5.5.19
External links
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.103
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.19
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.3
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.214
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.171
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.