CVE-2019-18634
Published: 31 January 2020
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.
Priority
Low
CVSS 3 base score: 7.8
Status
| Package | Release | Status |
|---|---|---|
|
sudo Launchpad, Ubuntu, Debian |
Upstream |
Released
(1.8.31)
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(1.8.31-1ubuntu1)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(1.8.21p2-3ubuntu1.2)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(1.8.16-0ubuntu1.9)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(1.8.9p5-1ubuntu1.5+esm3)
|
|
|
Patches: Upstream: https://github.com/sudo-project/sudo/commit/fa8ffeb17523494f0e8bb49a25e53635f4509078 |
||
Notes
| Author | Note |
|---|---|
| mdeslaur | pwfeedback is not enabled in Ubuntu affects 1.7.1 to 1.8.25p1 as it can't be exploited in 1.8.26 to 1.8.30 |