Is CVE-2019-18684 actively exploited?

No active exploitation of CVE-2019-18684 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-18684 be exploited remotely?

No. CVE-2019-18684 requires local access to exploit.

What is the CVSS score of CVE-2019-18684?

CVE-2019-18684 has a CVSS score of 7.0 (HIGH).

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HIGH

CVE-2019-18684

CWE-362Published: November 4, 2019· Updated: Jun 17, 2026

7.0

CVSS v3.1

Official Description

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

NVD Source

Technical Analysis

CVE-2019-18684 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.0.