SB2017062130 - Fedora 24 update for kernel
Published: June 21, 2017 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Memory corruption (CVE-ID: CVE-2017-1000364)
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to memory management errors in implementation of various functions under multiple operating systems. A local or remote attacker can trigger the affected application to process specially crafted data, trigger memory corruption and execute arbitrary code on the target system. The vulnerability is dubbed by Qualys researchers as “Stack Clash”.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
2) Security restrictions bypass (CVE-ID: CVE-2017-7482)
The vulnerability allows a local attacker to bypass security restrictions on the target system.The weakness exists due to the failure to take the argument and environment strings passed through RLIMIT_STACK/RLIM_INFINITY (1/4 of the size) into account when imposing a size restriction. A local attacker can bypass security limitation and perform unauthorized actions.
Successful exploitation of the vulnerability results in access to the system.
3) Security restrictions bypass (CVE-ID: CVE-2017-1000370)
The vulnerability allows a local attacker to bypass security restrictions on the target system.The weakness exists due to a flaw in offset2lib patch. A local attacker can send a specially-crafted request, bypass security restrictions and gain full access to the system.
4) Security restrictions bypass (CVE-ID: CVE-2017-1000371)
The vulnerability allows a local attacker to bypass security restrictions on the target system.The weakness exists due to a flaw in offset2lib patch. A local attacker can send a specially-crafted request, bypass security restrictions and gain full access to the system.
5) Input validation error (CVE-ID: CVE-2017-1000379)
The vulnerability allows a local authenticated user to execute arbitrary code.
The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack. Linux Kernel version 4.11.5 is affected.
Remediation
Install update from vendor's website.