CVE-2017-18266 Command injection in n/a

What is CVE-2017-18266?

CVE-2017-18266 is a high-severity command injection vulnerability in Canonical Ubuntu Linux, published on 10 May 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-74

Which versions are affected by CVE-2017-18266?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Freedesktop Xdg-Utils.

How do I fix CVE-2017-18266?

Upgrade to a fixed version.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2017-18266 being exploited?

There is no known exploitation of CVE-2017-18266 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-18266, DLA-1384-1, DSA-4211-1, GHSA-76r6-j2q8-m63q, MGASA-2018-0289, SUSE-SU-2018:1497-1 and 2 more.