CVE-2017-18266 Information

Description

The open_envvar function in xdg-open in xdg-utils before 1.1.3 does not validate strings before launching the program specified by the BROWSER environment variable which might allow remote attackers to conduct argument-injection attacks via a crafted URL as demonstrated by s in this environment variable.

CVSS Vector

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

Reference

https://bugs.freedesktop.org/show_bug.cgi?id=103807 https://cgit.freedesktop.org/xdg/xdg-utils/commit/?id=5647afb35e4bcba2060148e1a2a47bc43cc240f2 https://cgit.freedesktop.org/xdg/xdg-utils/commit/?id=ce802d71c3466d1dbb24f2fe9b6db82a1f899bcb https://cgit.freedesktop.org/xdg/xdg-utils/tree/ChangeLog https://lists.debian.org/debian-lts-announce/2018/05/msg00014.html https://usn.ubuntu.com/3650-1/ https://www.debian.org/security/2018/dsa-4211

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8