CVE-2017-7518

Impact:
Moderate
Public Date:
2017-06-22
CWE:
CWE-250
Bugzilla:
1464473: CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation
A flaw was found in the way the Linux KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.

Find out more about CVE-2017-7518 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 7. Future kernel updates for Red Hat Enterprise Linux 7
may address this issue.

CVSS v2 metrics

Base Score 5.4
Base Metrics AV:A/AC:M/Au:N/C:P/I:P/A:P
Access Vector Adjacent Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

CVSS v3 metrics

CVSS3 Base Score 5.5
CVSS3 Base Metrics CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact Low
Availability Impact Low

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2018:0412 2018-03-06
Red Hat Enterprise Linux 7 (kernel) RHSA-2018:0395 2018-03-06

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 7 kernel-alt Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Last Modified