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/E:U/U:Clear
CVE-ID: CVE-2019-11191
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2019-11191
Update Linux kernel to version 5.0.8.