CVE-2019-17495 Cross-site scripting in Swagger-UI

What is CVE-2019-17495?

CVE-2019-17495 is a critical cross-site scripting vulnerability in Oracle Banking Platform, published on 10 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A Cascading Style Sheets (CSS) injection vulnerability in Swagger UI before 3.23.11 allows attackers to use the Relative Path Overwrite (RPO) technique to perform CSS-based input field value exfiltration, such as exfiltration of a CSRF token value. In other words, this product intentionally allows the embedding of untrusted JSON data from remote servers, but it was not previously known that <style>@import within the JSON data was a functional attack method.

Weakness: CWE-352

Which versions are affected by CVE-2019-17495?

8 open source packages ship an affected version, including io.springfox:springfox-swagger-ui, org.webjars.npm:swagger-ui and org.webjars:swagger-ui. It affects 6 products.

Products include Oracle Banking Apis, Oracle Banking Digital Experience, Oracle Banking Platform, Oracle Primavera Gateway, Oracle Utilities Framework, Smartbear Swagger Ui.

How do I fix CVE-2019-17495?

Upgrade io.springfox:springfox-swagger-ui to 2.10.0 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2019-17495 being exploited?

There is no known exploitation of CVE-2019-17495 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Sources

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

Also known as GHSA-c427-hjc3-wrfw.