Memory corruption in Linux kernel - CVE-2017-15129

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Main Vulnerability Database Vulnerabilities #VU10680

Memory corruption in Linux kernel - CVE-2017-15129

Published: February 21, 2018


Vulnerability identifier: #VU10680
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-15129
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local unprivileged attacker to cause DoS condition no the target system.

The weakness exists due to the function get_net_ns_by_id() in net/core/net_namespace.c does not check for the net::count value after it has found a peer network in netns_ids idr. A local attacker can induce kernel memory corruption, trigger use-after-free and double free error in network namespaces code to cause the system to crash.

Affected software

Linux kernel
Red Hat Enterprise Linux for Power 9
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 Power, little endian
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server - TUS
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
SUSE Linux

kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-alt (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Virtualization Host

How to mitigate CVE-2017-15129

Install update from vendor's website.

kernel (Red Hat package) - addressed in versions 3.10.0-693.55.1.el7, 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 4.14.0-49.el7a

External References

Related Security Bulletins