Ubuntu Security Notice USN-4571-1
October 05, 2020
ruby-rack-cors vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
rack-cors would allow unintended access to files over the network.
Software Description:
- ruby-rack-cors: provides support for Cross-Origin Resource Sharing (CORS) for
Rack compatible web applications
Details:
It was discovered that rack-cors did not properly handle relative file
paths. An attacker could use this vulnerability to access arbitrary files.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
ruby-rack-cors 0.4.0-1+deb9u2build0.16.04.1
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4571-1
CVE-2019-18978
Package Information:
https://launchpad.net/ubuntu/+source/ruby-rack-cors/0.4.0-1+deb9u2build0.16.04.1
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