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How to analyze the Linux kernel competition condition vulnerabilities lead to remote code execution analysis, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

A computer device running a Linux distribution, if the kernel version is less than 5.0.8, may be affected by a kernel race condition vulnerability and cause the system to be unable to resist remote network attacks.

A potential attacker could exploit a rds_tcp_kill_sock TCP/IP implementation flaw in net/rds/tcp.c in the Linux kernel to trigger a denial of service (DoS) state of the device and implement remote code execution on the affected device.

An attacker can attack a vulnerable Linux device through specially crafted TCP packets that will trigger a "release after use" error on the target system and allow the attacker to execute arbitrary code on the target device.

NIST has a vulnerability score of 8.1 for this remote code execution vulnerability, so the vulnerability is a high-risk vulnerability (NVD), and the CVE number assigned to this vulnerability is CVE-2019-11815 (different versions of Red Hat, Ubuntu, SUSE, and Debian are affected by this vulnerability). Unauthenticated attackers will be able to exploit this vulnerability for remote code execution without any user interaction.

Fortunately, due to the high complexity of exploiting this vulnerability, the exploitable rating for this vulnerability is only 2.2 and the impact rating for this vulnerability is only 5.9.

According to the vulnerability impact metric of CVSS 3.0, vulnerability CVE-2019-11815 can have a very serious impact on the confidentiality, integrity, and availability of target devices and data. After successful exploitation of this vulnerability, potential attackers can gain access and modification rights to all resources of the target device, and even perform attacks such as denial of service.

As described in the CWE software security defect database: "the post-use release vulnerability is due to the software crash state caused by resources being referenced again after memory release, which can be a value or a piece of code."

Linux kernel developers released a security patch for the vulnerability CVE-2019-11815 at the end of May this year and fixed it in the Linux kernel v5.0.8 released on June 17.

It is recommended that users check whether their Linux devices are affected by this vulnerability as soon as possible, and install updated patches as soon as possible.

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