Information disclosure in Linux kernel - CVE-2019-5489

Vulnerability identifier: #VU16896

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-5489

CWE-ID: CWE-200

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to a flaw in the mincore() implementation in mm/mincore.c. A local attacker can observe page cache access patterns of other processes on the same system and sniff secret information.

Linux kernel
Red Hat Enterprise Linux Server - Extended Life Cycle Support
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL
Red Hat Enterprise Linux Server - Extended Update Support

MRG Realtime
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-alt (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Oracle VM Server for x86
Red Hat Virtualization Host
Data Computing Appliance (DCA)

Cybersecurity Help is currently unaware of any official solution to address the vulnerability.

kernel (Red Hat package) - addressed in versions 2.6.18-439.el5, 2.6.32-431.97.1.el6, 2.6.32-504.82.1.el6, 2.6.32-754.18.2.el6, 3.10.0-327.83.1.el7, 3.10.0-514.71.1.el7, 3.10.0-693.61.1.el7, 3.10.0-862.44.2.el7, 3.10.0-957.35.1.el7, 3.10.0-1062.el7, 4.18.0-80.15.1.el8_0
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.61.1.rt56.656.el6rt, 3.10.0-1062.rt56.1022.el7, 4.18.0-147.rt24.93.el8
kernel-alt (Red Hat package) - update to 4.14.0-115.12.1.el7a
Data Computing Appliance (DCA) - update to 3.5.4.0

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=574823bfab82d9d8fa47f422778043fbb4b4f50e
• https://github.com/torvalds/linux/commit/574823bfab82d9d8fa47f422778043fbb4b4f50e
• https://www.theregister.co.uk/2019/01/05/boffins_beat_page_cache/

• Information disclosure in Linux Kernel
• Red Hat update for kernel-rt
• Red Hat update for kernel
• Red Hat update for kernel
• Red Hat update for kernel
• Red Hat update for kernel
• Red Hat update for kernel-alt
• Red Hat 7.5 update for kernel
• Red Hat update for kernel-rt
• Red Hat update for kernel
• Red Hat update for kernel
• Red Hat update for kernel
• Red Hat update for kernel
• Red Hat update for kernel
• Multiple vulnerabilities in Dell EMC Data Computing Appliance (DCA)
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions update for kernel
• Multiple vulnerabilities in Oracle VM Server for x86