Buffer overflow in xen (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU32241

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-7094

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.

Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.

Mitigation

Install update from vendor's website.

Vulnerable software versions

xen (Alpine package): 4.4.4-r0 - 4.7.6-r0

xen (Alpine package):

CPE2.3

• cpe:2.3:a:alpine:xen_alpine_package:4.4.4-r0:*:*:*:*:alpine_linux:*:3.1
• cpe:2.3:a:alpine:xen_alpine_package:4.5.3-r0:*:*:*:*:alpine_linux:*:3.2
• cpe:2.3:a:alpine:xen_alpine_package:4.6.3-r1:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:a:alpine:xen_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=68368249e3421886c66d79df3bd184f6ff617041
https://git.alpinelinux.org/aports/commit/?id=5c041535044ad1c1cedc665c2d20f860fd0d58f3
https://git.alpinelinux.org/aports/commit/?id=716fb7870a1867cea94cca60f29602002a6f6f21
https://git.alpinelinux.org/aports/commit/?id=e0820355243b6bca932690909185512b442abafc

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.