SB2017100313 - Remote code execution in Linux Kernel
Published: October 3, 2017
Security Bulletin ID
SB2017100313
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free error (CVE-ID: CVE-2017-15126)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in fs/userfaultfd.c due to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put(). A remote attacker can trigger use-after-free error and execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
Remediation
Install update from vendor's website.