Linux sudo process vulnerability CVE-2019-18634

2020-02-24T19:08:00
ID F5:K91327225
Type f5
Reporter f5
Modified 2020-02-24T19:08:00

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. (CVE-2019-18634)

Impact

An attacker can trigger a stack-based buffer overflow in the privileged sudo process.