Race Condition The advisory has been revoked - it doesn't affect any version of package sudo Open this link in a new tab
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Test your applications- Snyk ID SNYK-DEBIAN9-SUDO-482319
- published 10 Nov 2019
- disclosed 4 Nov 2019
Introduced: 4 Nov 2019
CVE-2019-18684 Open this link in a new tabAmendment
The Debian security team deemed this advisory irrelevant for Debian:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream sudo package and not the sudo package as distributed by Debian.
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