CVE-2016-2097 actionview contains Path Traversal vulnerability

Medium 5.3 Published Updated

Remote attackers can read arbitrary files by exploiting a directory traversal flaw in Ruby on Rails' render method when unrestricted use is enabled.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2016-2097?

CVE-2016-2097 is a medium-severity path traversal vulnerability in Rubyonrails Rails, published on 7 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.2 and 4.x before 4.1.14.2 allows remote attackers to read arbitrary files by leveraging an application's unrestricted use of the render method and providing a .. (dot dot) in a pathname. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-0752.

Weakness: CWE-22

Which versions are affected by CVE-2016-2097?

8 open source packages ship an affected version, including actionpack and actionview. It affects 2 products.

PackageAffectedFixed in
actionpack RubyGemsFrom 3.0.03.2.22.2
actionpack RubyGemsFrom 3.0.03.2.22.2
actionpack RubyGemsFrom 4.0.04.1.14.2
actionpack RubyGemsFrom 4.0.04.1.14.2
actionview RubyGemsFrom 3.0.03.2.22.2
actionview RubyGemsFrom 3.0.03.2.22.2
2 more packages
actionview RubyGemsFrom 4.0.04.1.14.2
actionview RubyGemsFrom 4.0.04.1.14.2

Products include Rubyonrails Rails, Rubyonrails Ruby on Rails.

How do I fix CVE-2016-2097?

Upgrade actionpack to a fixed version for your release line: 3.2.22.2 or 4.1.14.2.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2016-2097 being exploited?

There is no known exploitation of CVE-2016-2097 in the wild and no public exploit code.

All Rubyonrails Rails vulnerabilities

Sources

Also known as DEBIAN-CVE-2016-2097, GHSA-vx9j-46rh-fqr8.

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