Infinite loop in xen (Alpine package)

1) Infinite loop

EUVDB-ID: #VU12647

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10981

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

The weakness exists due to a failure to reject invalid transitions between states. An adjacent attacker can submit a specially crafted request designed to force the QEMU device model on the system to switch the request between two states, trigger infinite loop and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

xen (Alpine package): 4.6.0-r0 - 4.6.6-r4

CPE2.3

• cpe:2.3:a:alpine:xen_alpine_package:4.6.0-r0:*:*:*:*:alpine_linux:*:3.2
• cpe:2.3:a:alpine:xen_alpine_package:4.6.0-r1:*:*:*:*:alpine_linux:*:3.2
• cpe:2.3:a:alpine:xen_alpine_package:4.6.0-r2:*:*:*:*:alpine_linux:*:3.2

External links

https://git.alpinelinux.org/aports/commit/?id=cf5828feef63ab62588f29482b15001535c73719
https://git.alpinelinux.org/aports/commit/?id=66ff4f8a6b71dd204bc568c21c45941d612402c2
https://git.alpinelinux.org/aports/commit/?id=96018bf2841ac59b632f6d84ad6247b5b825dc3a
https://git.alpinelinux.org/aports/commit/?id=5f72054ca4ac3f0f8f05c17a83a9c203f580bddc
https://git.alpinelinux.org/aports/commit/?id=d2a71459869989207ef392e3d8338330ee055a7f
https://git.alpinelinux.org/aports/commit/?id=9a8ee8c0046132a4ccaab5cffc615967367db70d
https://git.alpinelinux.org/aports/commit/?id=9bdda5f2061773ab7f74bacd75ba922ce5fef8ac

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.