CVE-2021-28169
Exploitation likely. EPSS gives it a 78% chance of exploitation in the next 30 days. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
78% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
9 events over 1842 days, from the signal feeds we watch.
- OpenVAS check added
- EPSS band changecritical → high
- EPSS band changehigh → critical
- Nuclei check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- OpenShift Container PlatformOperating Systems / linux-distro
- Jboss FuseOperating Systems / linux-distro
- Red Hat OpenStack PlatformOperating Systems / linux-distro
- Red Hat AMQ BrokerOperating Systems / linux-distro
- Red Hat Integration Service RegistryOperating Systems / linux-distro
- Red Hat Integration Camel QuarkusOperating Systems / linux-distro
- Red Hat IntegrationOperating Systems / linux-distro
- Red Hat Developer ToolsOperating Systems / linux-distro
And 7 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Scored 5.3 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- github.com/eclipse/jetty.project/security/advisories/GHSA-gwcr-j4wh-j3cq&
- security-tracker.debian.org/tracker/CVE-2021-28169/&
- access.redhat.com/security/cve/CVE-2021-28169&
And 48 more references. See all after sign-in
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