SB2019041206 - Race condition in Linux kernel
Published: April 12, 2019 Updated: April 22, 2019
Security Bulletin ID
SB2019041206
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2019-11191)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.