Buffer overflow in Linux kernel - CVE-2019-18198
Published: October 19, 2019
Vulnerability identifier: #VU21943
CSH Severity: Low
CVSS v4.0: 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-2019-18198
CWE-ID: CWE-119
Exploitation vector: Local 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 system.
The vulnerability exists due to a reference count usage error in the fib6_rule_suppress() function in the
fib6 suppression feature of net/ipv6/fib6_rules.c within the Linux kernel, when handling the
FIB_LOOKUP_NOREF flag. A local user can set the FIB_LOOKUP_NOREF flag, trigge rmemory corruption and execute arbitrary code on the system with elevated privileges.
How to mitigate CVE-2019-18198
Install updates from vendor's repository.