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CVE-2021-28169 (GCVE-0-2021-28169)

Vulnerability from cvelistv5 – Published: 2021-06-09 01:55 – Updated: 2024-08-03 21:40
VLAI
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
Assigner
References
URL Tags
https://github.com/eclipse/jetty.project/security… x_refsource_CONFIRM
https://lists.apache.org/thread.html/r2721aba31a8… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ref1c161a162… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r29678972c3f… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r04a4b4553a2… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rd5b52362f5e… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r284de9c5399… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r234f6452297… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r91e34ff61af… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rb1292d30462… mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4949 vendor-advisoryx_refsource_DEBIAN
https://lists.apache.org/thread.html/rfff6ff8ffb3… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r32b0b640ad2… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rf36f1114e84… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rddbb4f8d5db… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r33eb06b05af… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r67c4f90658f… mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpuoct2021.html x_refsource_MISC
https://lists.apache.org/thread.html/r8a1a332899a… x_refsource_MISC
https://lists.apache.org/thread.html/rbefa055282d… x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021072… x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
Impacted products
Vendor Product Version CPE status
The Eclipse Foundation Eclipse Jetty Affected: unspecified , ≤ 9.4.40 (custom)
Affected: unspecified , ≤ 10.0.2 (custom)
Affected: unspecified , ≤ 11.0.2 (custom)
guessed Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T07:00:54+00:00",
      "cve": "CVE-2021-28169",
      "id": "CVE-2021-28169",
      "initial_release_date": "2021-06-08T00:00:00+00:00",
      "product_status:fixed": "7",
      "product_status:known_affected": "48",
      "product_status:known_not_affected": "345",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "jetty: requests to the ConcatServlet and WelcomeFilter are able to access protected resources within the WEB-INF directory",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-28169.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.