CVE-2018-14678

HIGH7.8

An issue was discovered in the Linux kernel through 4

Published Jul 28, 2018

Modified 1 years ago

Details

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

References

WEBhttp://www.securityfocus.com/bid/104924 WEBhttp://www.securitytracker.com/id/1041397 WEBhttps://lists.debian.org/debian-lts-announce/2018/10/msg00003.html ADVISORYhttps://usn.ubuntu.com/3931-1/ADVISORYhttps://usn.ubuntu.com/3931-2/ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2018-14678 ADVISORYhttps://www.debian.org/security/2018/dsa-4308 WEBhttps://xenbits.xen.org/xsa/advisory-274.html

CVSS Analysis

CVSS v3.1

7.8

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

7.8/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Ecosystems

Timeline

PublishedJul 28, 2018

ModifiedAug 5, 2024