#VU19998 Infinite loop in Linux kernel - CVE-2019-3900
Vulnerability identifier: #VU19998
Vulnerability risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2019-3900
CWE-ID:
CWE-835
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 attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in vhost_net kernel module when processing incoming packets in handle_rx(). A remote attacker with access to guest operating system can stall the vhost_net kernel thread and cause denial of service conditions.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Linux kernel: 4.4 - 4.4.190, 4.9 - 4.9.189, 4.14.0 rc1 - 4.19.63, 5.1 rc1 - 5.1
External links
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.133
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.64
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.191
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.190
Q & A
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.
