Race condition in Linux kernel - CVE-2019-11191
Published: April 22, 2019
Vulnerability identifier: #VU18327
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11191
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exist due to a race condition within the load_aout_binary() function in fs/binfmt_aout.c when reading the "/proc/pid/stat" file if CONFIG_IA32_AOUT is enabled and ia32_aout is loaded. A local user can create a specially crafted program, run it on the affected system and bypass ASLR on setuid programs.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-snapdragon (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oem (Ubuntu package)
linux-gcp (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-snapdragon (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oem (Ubuntu package)
linux-gcp (Ubuntu package)
How to mitigate CVE-2019-11191
Update Linux kernel to version 5.0.8.
Linux kernel - update to 5.0.8
linux (Ubuntu package) - addressed in versions 4.4.0-150.176, 4.15.0-51.55, 4.18.0-21.22
linux-raspi2 (Ubuntu package) - addressed in versions 4.4.0-1110.118, 4.15.0-1037.39
linux-kvm (Ubuntu package) - addressed in versions 4.4.0-1047.53, 4.15.0-1035.35, 4.18.0-1013.13
linux-aws (Ubuntu package) - addressed in versions 4.4.0-1084.94, 4.15.0-1040.42, 4.18.0-1017.19
linux-snapdragon (Ubuntu package) - addressed in versions 4.4.0-1114.119, 4.15.0-1054.58
linux-oracle (Ubuntu package) - update to 4.15.0-1014.16
linux-oem (Ubuntu package) - update to 4.15.0-1039.44
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1033.35, 4.18.0-1012.13
linux (Ubuntu package) - addressed in versions 4.4.0-150.176, 4.15.0-51.55, 4.18.0-21.22
linux-raspi2 (Ubuntu package) - addressed in versions 4.4.0-1110.118, 4.15.0-1037.39
linux-kvm (Ubuntu package) - addressed in versions 4.4.0-1047.53, 4.15.0-1035.35, 4.18.0-1013.13
linux-aws (Ubuntu package) - addressed in versions 4.4.0-1084.94, 4.15.0-1040.42, 4.18.0-1017.19
linux-snapdragon (Ubuntu package) - addressed in versions 4.4.0-1114.119, 4.15.0-1054.58
linux-oracle (Ubuntu package) - update to 4.15.0-1014.16
linux-oem (Ubuntu package) - update to 4.15.0-1039.44
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1033.35, 4.18.0-1012.13