CVE-2019-18634
sudo - security update
7.8
HIGH
CVSS 3.1
EPSS 88.0%
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.
How to fix CVE-2019-18634
To remediate CVE-2019-18634, upgrade the affected package to a fixed version below.
- —upgrade to 1.8.27-r2 or later
- —upgrade to 1.8.31-1 or later
- —upgrade to 1.8.10p3-1+deb8u7 or later
- —upgrade to 1.8.19p1-2.1+deb9u2 or later
Is CVE-2019-18634 being exploited?
Likely — EPSS is 88.0%, placing CVE-2019-18634 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (4)
- from 0, < 1.8.27-r2
- from 0, < 1.8.31-1
- from 0, < 1.8.10p3-1+deb8u7
- from 0, < 1.8.19p1-2.1+deb9u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |