CVE-2018-16471

Description

There is a possible XSS vulnerability in Rack before 2.0.6 and 1.6.11. Carefully crafted requests can impact the data returned by the `scheme` method on `Rack::Request`. Applications that expect the scheme to be limited to 'http' or 'https' and do not escape the return value could be vulnerable to an XSS attack. Note that applications using the normal escaping mechanisms provided by Rails may not impacted, but applications that bypass the escaping mechanisms, or do not use them may be vulnerable.

How to fix CVE-2018-16471

To remediate CVE-2018-16471, upgrade the affected package to a fixed version below.

• —upgrade to 1.6.4-6 or later
• —upgrade to 1.5.2-3+deb8u2 or later
• —upgrade to 2.0.6 or later

Is CVE-2018-16471 being exploited?

Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• from 0, < 1.6.4-6
• from 0, < 1.5.2-3+deb8u2
• >= 2.0.0, < 2.0.6

CVSS scores

References (10)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2018-16471
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2018-16471
• PATCHgithub.com/rack/rack
• WEBlists.opensuse.org/opensuse-security-announce/2019-06/msg00032.html
• WEB