A vulnerability was found in Linux Kernel up to 4.10 (Operating System) and classified as critical. This issue affects an unknown code block of the file net/ipv6/ip6mr.c of the component Socket Option Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels.

The weakness was published 08/13/2019 (Website). The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2017-18509 since 08/13/2019. An attack has to be approached locally. The requirement for exploitation is a simple authentication. Technical details are known, but no exploit is available.

Upgrading to version 4.11 eliminates this vulnerability.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10

License

• open-source

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CPE 2.2info

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