#VU9518 Use-after-free in Linux kernel - CVE-2017-17053

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Main Vulnerability Database Vulnerabilities #VU9518

#VU9518 Use-after-free in Linux kernel - CVE-2017-17053

Published: December 2, 2017 / Updated: December 2, 2017


Vulnerability identifier: #VU9518
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-17053
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local user to execute arbitrary code on the target system with elevated privileges.

The vulnerability exists due to use-after-free error within the init_new_context() function in arch/x86/include/asm/mmu_context.h in the Linux kernel before 4.12.10 when handling errors in LDT table allocation during forking of a new process. A local user can execute a specially crafted application and execute arbitrary code on the system with escalated privileges.

This vulnerability only affected kernels built with "CONFIG_MODIFY_LDT_SYSCALL" set to "Y".



Remediation

Update to version 4.12.10.

External links