Overview
Recently, NSFOCUS CERT detected that a researcher disclosed an EXP that exists in the Linux kernel privilege escalation vulnerability (CVE-2022-2588) on the Internet. Due to improper operation of the route4_filter linked list, there is a use-after-free vulnerability in the route4_change function of the net/schedule/cls_route.c filter. By exploiting this vulnerability, a local attacker with general user permission can obtain root privileges of the current system. The CVSS score is 7.8, please take measures to protect as soon as possible.
Reference link:
https://access.redhat.com/security/cve/cve-2022-2588
Scope of Impact
Affected version
- Linux Kernel >= v2.6.12-rc2
Unaffected version
- Linux Kernel >= v5.19
Vulnerability Detection
Linux system users can check whether the current system is affected by checking the version. The command to check the operating system version information is as follows:
cat /proc/version
Mitigation
Official upgrade
At present, the official kernel version has been upgraded to fix this vulnerability. Affected users are requested to update the version as soon as possible for protection. The official download link: https://www.kernel.org
Redhat: https://access.redhat.com/security/cve/cve-2022-2588
Ubuntu: https://ubuntu.com/security/CVE-2022-2588
Debian: https://security-tracker.debian.org/tracker/CVE-2022-2588
Statement
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
About NSFOCUS
NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.
NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA).
A wholly owned subsidiary of NSFOCUS Technologies Group Co., Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.
