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CVE-2021-28169

MEDIUMCVSS 5.3/10EPSS 78.48%

Last modified

CVE-2021-28169 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 78.48% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability
78.48%

99.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
EclipseJetty< 9.4.41
EclipseJetty>= 10.0.0, < 10.0.3
EclipseJetty>= 11.0.0, < 11.0.3
DebianDebian Linux9.0
DebianDebian Linux10.0
OracleCommunications Cloud Native Core Policy1.14.0
OracleRest Data Services< 21.3
NetappActive Iq Unified ManagerAll versions
NetappHciAll versions
NetappManagement Services For Element SoftwareAll versions
NetappSnap Creator FrameworkAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-28169?
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 severe is CVE-2021-28169?
CVE-2021-28169 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 78.48% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28169?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28169?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST