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Ubuntu Security Notice USN-6731-1
April 15, 2024

yard vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS (Available with Ubuntu Pro)
• Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in yard.

Software Description:

• yard: Ruby documentation tool

Details:

It was discovered that YARD before 0.9.11 does not block relative paths
with an initial …/ sequence, which allows attackers to conduct
directory traversal attacks and read arbitrary files. This issue only
affected Ubuntu 16.04 LTS. (CVE-2017-17042)

It was discovered that yard before 0.9.20 is affected by a path
traversal vulnerability, allowing HTTP requests to access arbitrary
files under certain conditions. This issue only affected Ubuntu 18.04
LTS. (CVE-2019-1020001)

Aviv Keller discovered that the “frames.html” file within the Yard
Doc’s generated documentation is vulnerable to Cross-Site Scripting
(XSS) attacks due to inadequate sanitization of user input within the
JavaScript segment of the “frames.erb” template file. (CVE-2024-27285)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
yard 0.9.28-2ubuntu0.1

Ubuntu 22.04 LTS:
yard 0.9.26-1ubuntu0.1

Ubuntu 20.04 LTS:
yard 0.9.24-1+deb11u1build0.20.04.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
yard 0.9.12-2ubuntu0.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
yard 0.8.7.6+git20160220-3ubuntu0.1~esm1

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6731-1
CVE-2017-17042, CVE-2019-1020001, CVE-2024-27285

Package Information:
https://launchpad.net/ubuntu/+source/yard/0.9.28-2ubuntu0.1
https://launchpad.net/ubuntu/+source/yard/0.9.26-1ubuntu0.1
https://launchpad.net/ubuntu/+source/yard/0.9.24-1+deb11u1build0.20.04.1