CVE-2021-28169
jetty9 - security update
5.3
MEDIUM
CVSS 3.1
EPSS 90.3%
Description
For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory. For example a request to `/concat?/%2557EB-INF/web.xml` can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.
How to fix CVE-2021-28169
To remediate CVE-2021-28169, upgrade the affected package to a fixed version below.
- —upgrade to 9.4.39-2 or later
- —upgrade to 9.2.30-0+deb9u2 or later
- —upgrade to 9.4.41 or later
Is CVE-2021-28169 being exploited?
Likely — EPSS is 90.3%, placing CVE-2021-28169 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- from 0, < 9.4.39-2
- from 0, < 9.2.30-0+deb9u2
- from 0, < 9.4.41
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |