CVE-2019-18634

CVE Details

Release Date:	2020-01-29
Impact:	None	What is this?

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.

See more information about CVE-2019-18634 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.8
Vector String:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (sudo)	ELSA-2020-0726	2020-03-05
Oracle Linux version 7 (sudo)	ELSA-2020-0540	2020-02-19
Oracle Linux version 8 (sudo)	ELSA-2020-0487	2020-02-13
Oracle VM version 3.3 (sudo)	OVMSA-2020-0006	2020-03-09
Oracle VM version 3.4 (sudo)	OVMSA-2020-0006	2020-03-09