Resource exhaustion in Linux kernel - CVE-2017-7472

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Main Vulnerability Database Vulnerabilities #VU12299

Resource exhaustion in Linux kernel - CVE-2017-7472

Published: April 30, 2018 / Updated: September 14, 2018


Vulnerability identifier: #VU12299
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-2017-7472
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability: Public exploit is available

Vulnerability details

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

The weakness exists in the KEYS subsystem due to memory consumption. A local attacker can cause the service to crash via a series of KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring calls.

Affected software

Linux kernel
Red Hat Enterprise Linux for IBM z Systems
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 Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
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 for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server (for IBM Power LE) - 4 Year Extended Update Support
Red Hat Enterprise Linux Server - 4 Year Extended Update Support
SUSE Linux
MRG Realtime
Oracle VM Server for x86
Red Hat Virtualization Host
kernel (Red Hat package)
kernel-rt (Red Hat package)

How to mitigate CVE-2017-7472

Update to version 4.10.13.

kernel (Red Hat package) - update to 3.10.0-693.17.1.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.17.1.rt56.604.el6rt, 3.10.0-693.17.1.rt56.636.el7

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins