#VU32259 Resource exhaustion in Xen - CVE-2016-5403
Vulnerability identifier: #VU32259
Vulnerability risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-400
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Xen
Server applications /
Virtualization software
Vendor: Xen Project
Description
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
The virtqueue_pop function in hw/virtio/virtio.c in QEMU allows local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) by submitting requests without waiting for completion.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Xen: 4.24
External links
https://rhn.redhat.com/errata/RHSA-2016-1585.html
https://rhn.redhat.com/errata/RHSA-2016-1586.html
https://rhn.redhat.com/errata/RHSA-2016-1606.html
https://rhn.redhat.com/errata/RHSA-2016-1607.html
https://rhn.redhat.com/errata/RHSA-2016-1652.html
https://rhn.redhat.com/errata/RHSA-2016-1653.html
https://rhn.redhat.com/errata/RHSA-2016-1654.html
https://rhn.redhat.com/errata/RHSA-2016-1655.html
https://rhn.redhat.com/errata/RHSA-2016-1756.html
https://rhn.redhat.com/errata/RHSA-2016-1763.html
https://rhn.redhat.com/errata/RHSA-2016-1943.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
https://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://www.securityfocus.com/bid/92148
https://www.securitytracker.com/id/1036476
https://www.ubuntu.com/usn/USN-3047-1
https://www.ubuntu.com/usn/USN-3047-2
https://xenbits.xen.org/xsa/advisory-184.html
https://bugzilla.redhat.com/show_bug.cgi?id=1358359
https://lists.debian.org/debian-lts-announce/2019/09/msg00021.html
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
