CVE-2017-18266

Publication date 10 May 2018

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.8 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
xdg-utils 18.04 LTS bionic
Fixed 1.1.2-1ubuntu2.2
17.10 artful
Fixed 1.1.1-1ubuntu3.2
16.04 LTS xenial
Fixed 1.1.1-1ubuntu1.16.04.3
14.04 LTS trusty
Fixed 1.1.0~rc1-2ubuntu7.2

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
xdg-utils

Severity score breakdown

Parameter Value
Base score 8.8 · High
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

References

Related Ubuntu Security Notices (USN)

Other references