In Eclipse Jetty, versions 9.2.x and older, 9.3.x (all configurations), and 9.4.x (non-default configuration with RFC2616 compliance enabled), transfer-encoding chunks are handled poorly. The chunk length parsing was vulnerable to an integer overflow. Thus a large chunk size could be interpreted as a smaller chunk size and content sent as chunk body could be interpreted as a pipelined request. If Jetty was deployed behind an intermediary that imposed some authorization and that intermediary allowed arbitrarily large chunks to be passed on unchanged, then this flaw could be used to bypass the authorization imposed by the intermediary as the fake pipelined request would not be interpreted by the intermediary as a request.
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CVE-2017-7657 - High Severity Vulnerability
Vulnerable Library - jetty-http-9.4.3.v20170317.jar
The Eclipse Jetty Project
Library home page: http://www.eclipse.org/jetty
Path to dependency file: test-samples/samples/testing-frameworks/appium/server-side/image-recognition/pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/org/eclipse/jetty/jetty-http/9.4.3.v20170317/jetty-http-9.4.3.v20170317.jar
Dependency Hierarchy: - java-client-5.0.0-BETA8.jar (Root Library) - selenium-java-3.4.0.jar - websocket-client-9.4.3.v20170317.jar - jetty-client-9.4.3.v20170317.jar - :x: **jetty-http-9.4.3.v20170317.jar** (Vulnerable Library)
Found in HEAD commit: 12af4f854b64888df6e4492ecc94e141388e939a
Found in base branch: master
Vulnerability Details
In Eclipse Jetty, versions 9.2.x and older, 9.3.x (all configurations), and 9.4.x (non-default configuration with RFC2616 compliance enabled), transfer-encoding chunks are handled poorly. The chunk length parsing was vulnerable to an integer overflow. Thus a large chunk size could be interpreted as a smaller chunk size and content sent as chunk body could be interpreted as a pipelined request. If Jetty was deployed behind an intermediary that imposed some authorization and that intermediary allowed arbitrarily large chunks to be passed on unchanged, then this flaw could be used to bypass the authorization imposed by the intermediary as the fake pipelined request would not be interpreted by the intermediary as a request.
Publish Date: 2018-06-26
URL: CVE-2017-7657
CVSS 3 Score Details (9.8)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://bugs.eclipse.org/bugs/show_bug.cgi?id=535668
Release Date: 2018-06-26
Fix Resolution: org.eclipse.jetty:jetty-server:9.3.24.v20180605,9.4.11.v20180605;org.eclipse.jetty:jetty-http:9.3.24.v20180605,9.4.11.v20180605