Denial of service in xen (Alpine package)

Published: 2018-09-06

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2018-15469
CWE-ID	CWE-264
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	xen (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Denial of service

EUVDB-ID: #VU14472

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15469

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The vulnerability exists due to improper implementation of version 2 of grant tables in the affected software, in the hypervisor or in Linux. An adjacent attacker can request version 2 grant tables, trigger a BUG() check and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

xen (Alpine package): 4.8.4-r0

CPE2.3

cpe:2.3:o:alpine:xen_alpine_package:4.8.4-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=fa4aef12fe69b28f195024708e67ea7e48e9fca6
http://git.alpinelinux.org/aports/commit/?id=8a2e635d73f2f09c768259b4730dcf3f55d0ed93
http://git.alpinelinux.org/aports/commit/?id=ca1b59327d93bdc40e475877934ab83be23847f1
http://git.alpinelinux.org/aports/commit/?id=74dce6e0451466b8eb5078660886cc226f9704f4

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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