Information disclosure in macOS - CVE-2018-3646

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Main Vulnerability Database Vulnerabilities #VU15451

Information disclosure in macOS - CVE-2018-3646

Published: October 22, 2018 / Updated: October 31, 2018


Vulnerability identifier: #VU15451
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-3646
CWE-ID: CWE-200
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.

The weakness exists on the systems with microprocessors utilizing speculative execution and address translations due to an error in Hypervisor. An adjacent attacker can access information residing in the L1 data cache via a terminal page fault and a side-channel analysis.


Affected software

macOS
Amazon Linux AMI
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Oracle Solaris
Opensuse
Fedora
MRG Realtime
Red Hat Virtualization Host
xen (Alpine package)
kernel (Red Hat package)
kernel-rt (Red Hat package)
xen
kernel-headers
kernel

How to mitigate CVE-2018-3646

Update to version 10.14.1.

macOS - update to 10.14.1 18B75
xen (Alpine package) - update to 4.8.5-r0
kernel (Red Hat package) - addressed in versions 2.6.32-358.91.4.el6, 2.6.32-431.91.3.el6, 2.6.32-504.72.4.el6, 2.6.32-573.60.4.el6, 2.6.32-754.3.5.el6, 3.10.0-327.71.4.el7, 3.10.0-514.55.4.el7, 3.10.0-693.37.4.el7, 3.10.0-862.11.6.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.37.4.rt56.629.el6rt, 3.10.0-862.11.6.rt56.819.el7
xen - addressed in versions 4.9.2-7.fc27, 4.10.1-6.fc28
kernel-headers - addressed in versions 4.17.14-2.fc27, 4.17.14-2.fc28, 4.17.14-3.fc27, 4.17.14-3.fc28
kernel - addressed in versions 4.17.14-101.fc27, 4.17.14-102.fc27, 4.17.14-201.fc28, 4.17.14-202.fc28

External References

Related Security Bulletins