sudo: In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in t...
CVE-2019-18634 is fixed in 2 products on 1 platform, first by sudo 1.8.21p2-3ubuntu1.2, released January 30, 2020. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| sudo · RHEL 8 | 0:1.8.25p1-8.el8_1.1 | RHSA-2020:0487 | Feb 14, 2020 |
| sudo · Ubuntu 18.04.6 LTS (bionic) | 1.8.21p2-3ubuntu1.2 | sudo 1.8.21p2-3ubuntu1.2 | Jan 30, 2020 |
| sudo · ol 8 | 0:1.8.25p1-8.el8_1.1 | ELSA-2020-0487 | Feb 13, 2020 |
| sudo-ldap · Ubuntu 18.04.6 LTS (bionic) | 1.8.21p2-3ubuntu1.2 | sudo-ldap 1.8.21p2-3ubuntu1.2 | Jan 30, 2020 |
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