CVE-2019-18684

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

Affected products

Alt Linux, Sudo

Sudo Project Sudo

≤ 1.8.29

Fix

Available

CVSS 3.1

7.0 HIGH

EPSS

0.3% (22th percentile)

Weakness

CWE-362

NVD status

Modified

Published

2019-11-04

No exploit for CVE-2019-18684 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.