cve/2017/CVE-2017-17807.md

### [CVE-2017-17807](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17807)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.

### POC

#### Reference
- https://usn.ubuntu.com/3620-1/

#### Github
- https://github.com/ARPSyndicate/cvemon