CVE-2019-15900 Information

Description

An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD. On platforms without strtonum(3) sscanf was used without checking for error cases. Instead the uninitialized variable errstr was checked and in some cases returned success even if sscanf failed. The result was that instead of reporting that the supplied username or group name did not exist it would execute the command as root.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/slicer69/doas/commit/2f83222829448e5bc4c9391d607ec265a1e06531 https://github.com/slicer69/doas/compare/6.1p1…6.2

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8