CVE-2017-13649 Information

Description

UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a \kill cat /pathname\ command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

http://www.securityfocus.com/bid/100507 https://bugs.unrealircd.org/view.php?id=4990

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5