Out-of-bounds read in Linux kernel - CVE-2017-11600

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Main Vulnerability Database Vulnerabilities #VU8131

Out-of-bounds read in Linux kernel - CVE-2017-11600

Published: September 7, 2017 / Updated: April 30, 2018


Vulnerability identifier: #VU8131
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-11600
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in net/xfrm/xfrm_policy.c due to it does not ensure that the dir value of xfrm_userpolicy_id is XFRM_POLICY_MAX or less when CONFIG_XFRM_MIGRATE is enabled. A local attacker can submit a specially crafted XFRM_MSG_MIGRATE xfrm Netlink message and cause the service to crash.

Affected software

Linux kernel
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
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 for Real Time
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Server - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux Server - AUS
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 Server - TUS
SUSE Linux

MRG Realtime
kernel (Red Hat package)
kernel-rt (Red Hat package)
Red Hat Virtualization Host

How to mitigate CVE-2017-11600

Update to version 4.12.4.

kernel (Red Hat package) - addressed in versions 3.10.0-693.47.2.el7, 3.10.0-862.6.3.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.47.2.rt56.641.el6rt, 3.10.0-862.6.3.rt56.811.el7

External References

Related Security Bulletins