CVE-2019-18634
Description
In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-18634
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2019-18634.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202002-2
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 1.8.31-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 1.8.31-1 |
| debian | bullseye | fixed | 1.8.31-1 |
| debian | forky | fixed | 1.8.31-1 |
| debian | sid | fixed | 1.8.31-1 |
| debian | trixie | fixed | 1.8.31-1 |
References
Verify integrity in audit chain (admin only). AS-IS.