RHSA-2021:4012

Vulnerability from csaf_redhat - Published: 2021-10-28 07:52 - Updated: 2026-05-14 22:31
Summary
Red Hat Security Advisory: Red Hat support for Spring Boot 2.4.9 security update
Severity
Moderate
Notes
Topic: An update is now available for Red Hat support for Spring Boot. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability. For more information, see the CVE links in the References section.
Details: Red Hat support for Spring Boot provides an application platform that reduces the complexity of developing and operating applications (monoliths and microservices) for OpenShift as a containerized platform. This release of Red Hat support for Spring Boot 2.4.9 serves as a replacement for Red Hat support for Spring Boot 2.3.10 and includes security, bug fixes, and enhancements. For more information, see the release notes listed in the References section. Security Fix(es): * tomcat: Apache Tomcat HTTP/2 Request mix-up (CVE-2020-13943) * tomcat: HTTP/2 request header mix-up (CVE-2020-17527) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2020-13943

A flaw was found in Apache Tomcat. If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it is possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources. The highest threat from this vulnerability is to data confidentiality.

5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Affected products
Product Identifier Version Remediation
Red Hat Support for Spring Boot 2.4.9
Red Hat / Red Hat OpenShift Application Runtimes
 cpe:/a:redhat:openshift_application_runtimes:1.0 —
Vendor Fix fix
Threats
Impact Moderate
CVE-2020-17527

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Affected products
Product Identifier Version Remediation
Red Hat Support for Spring Boot 2.4.9
Red Hat / Red Hat OpenShift Application Runtimes
 cpe:/a:redhat:openshift_application_runtimes:1.0 —
Vendor Fix fix
Threats
Impact Moderate
References
To clipboard 

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}


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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.