Sinatra up to 2.2.2/3.0.3 Header Content-Disposition code download

Summaryinfo

A vulnerability marked as problematic has been reported in Sinatra up to 2.2.2/3.0.3. Affected is an unknown function of the component Header Handler. This manipulation of the argument Content-Disposition causes code download. This vulnerability is tracked as CVE-2022-45442. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Sinatra up to 2.2.2/3.0.3. It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Header Handler. The manipulation of the argument Content-Disposition with an unknown input leads to a code download vulnerability. The CWE definition for the vulnerability is CWE-494. The product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code. As an impact it is known to affect confidentiality. The summary by CVE is:

Sinatra is a domain-specific language for creating web applications in Ruby. An issue was discovered in Sinatra 2.0 before 2.2.3 and 3.0 before 3.0.4. An application is vulnerable to a reflected file download (RFD) attack that sets the Content-Disposition header of a response when the filename is derived from user-supplied input. Version 2.2.3 and 3.0.4 contain patches for this issue.

The weakness was disclosed 11/29/2022 as GHSA-8x94-hmjh-97hq. The advisory is shared at github.com. This vulnerability is known as CVE-2022-45442 since 11/15/2022. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1495 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 242690 (Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : Sinatra vulnerabilities (USN-7664-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.2.3 or 3.0.4 eliminates this vulnerability. Applying the patch ea8fc9495a350f7551b39e3025bfcd06f49f363b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (242690). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Sinatra

Version

• 2.2.0
• 2.2.1
• 2.2.2
• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3

License

• open-source

Website

• Product: https://github.com/sinatra/sinatra/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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