cve/2019/CVE-2019-18684.md

### [CVE-2019-18684](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18684)
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### Description

** DISPUTED ** Sudo through 1.8.29 allows local users to escalate to root if they have write access to file descriptor 3 of the sudo process. This occurs because of a race condition between determining a uid, and the setresuid and openat system calls. The attacker can write "ALL ALL=(ALL) NOPASSWD:ALL" to /proc/#####/fd/3 at a time when Sudo is prompting for a password. NOTE: This has been disputed due to the way Linux /proc works. It has been argued that writing to /proc/#####/fd/3 would only be viable if you had permission to write to /etc/sudoers. Even with write permission to /proc/#####/fd/3, it would not help you write to /etc/sudoers.

### POC

#### Reference
- https://gist.github.com/oxagast/51171aa161074188a11d96cbef884bbd

#### Github
No PoCs found on GitHub currently.