CVE-2019-18634
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Sudo
PublishedJan 29, 2020
First seenJan 29, 2020
How to fix
Update
- sudo_project sudo1.8.26 or later
Vendor advisories
- debian.org/security/2020/dsa-4614
- usn.ubuntu.com/4263-1/
- usn.ubuntu.com/4263-2/
- access.redhat.com/errata/RHSA-2020:0487
- access.redhat.com/errata/RHSA-2020:0509
- access.redhat.com/errata/RHSA-2020:0540
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/
- access.redhat.com/errata/RHSA-2020:0726
- security.gentoo.org/glsa/202003-12
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sudo_project sudo | 1.7.1 ≤ v < 1.8.26 | 1.8.26 |
| debian debian_linux | 8.0, 9.0, 10.0 | — |
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