Privilege escalation in Linux kernel - CVE-2018-5750

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Main Vulnerability Database Vulnerabilities #VU10362

Privilege escalation in Linux kernel - CVE-2018-5750

Published: February 5, 2018


Vulnerability identifier: #VU10362
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-5750
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to a flaw in the acpi_smbus_hc_add() function in 'drivers/acpi/sbshc.c'. A local attacker can submit a specially crafted SBS HC printk system call to obtain potentially sensitive address information and potentially bypass kernel address space layout randomization (KASLR) security protection.


Affected software

Linux kernel
Amazon Linux AMI
Debian Linux
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
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 for Power, little endian
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Ubuntu
Fedora

kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-alt (Red Hat package)
kernel
Red Hat Virtualization Host

How to mitigate CVE-2018-5750

Update to the latest versions.

kernel (Red Hat package) - update to 3.10.0-862.el7
kernel-rt (Red Hat package) - update to 3.10.0-862.rt56.804.el7
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a
kernel - addressed in versions 4.14.16-200.fc26, 4.14.16-300.fc27

External References

Related Security Bulletins