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CVE-2017-18266

Published: 10 May 2018

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.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
xdg-utils
Launchpad, Ubuntu, Debian
upstream Needs triage

xenial
Released (1.1.1-1ubuntu1.16.04.3)
artful
Released (1.1.1-1ubuntu3.2)
bionic
Released (1.1.2-1ubuntu2.2)
trusty
Released (1.1.0~rc1-2ubuntu7.2)
Patches:
other: https://cgit.freedesktop.org/xdg/xdg-utils/commit/?id=ce802d71c3466d1dbb24f2fe9b6db82a1f899bcb

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H