Resource exhaustion in Linux kernel - CVE-2016-3672
Published: April 27, 2018 / Updated: June 17, 2021
Vulnerability identifier: #VU12259
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-3672
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The weakness exists in the arch_pick_mmap_layout function in arch/x86/mm/mmap.c due to improper randomizing of the legacy base address. A local attacker can disable stack-consumption resource limits, defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag and bypass the ASLR protection mechanism for a setuid or setgid program.
The weakness exists in the arch_pick_mmap_layout function in arch/x86/mm/mmap.c due to improper randomizing of the legacy base address. A local attacker can disable stack-consumption resource limits, defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag and bypass the ASLR protection mechanism for a setuid or setgid program.
Affected software
Linux kernel
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
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 Desktop
Red Hat Enterprise Linux Server
Fedora
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel
Red Hat Virtualization Host
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
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 Desktop
Red Hat Enterprise Linux Server
Fedora
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel
Red Hat Virtualization Host
How to mitigate CVE-2016-3672
Update to version 4.5.2.
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 - addressed in versions 4.4.7-200.fc22, 4.4.7-300.fc23, 4.4.8-200.fc22, 4.5.1-300.fc24
kernel-rt (Red Hat package) - update to 3.10.0-862.rt56.804.el7
kernel - addressed in versions 4.4.7-200.fc22, 4.4.7-300.fc23, 4.4.8-200.fc22, 4.5.1-300.fc24