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    Gentoo: GLSA-202012-23: Apache Tomcat: Information disclosure

    Date 24 Dec 2020
    522
    Posted By LinuxSecurity Advisories
    A vulnerability has been discovered in Apache Tomcat that allows for the disclosure of sensitive information.
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    Gentoo Linux Security Advisory                           GLSA 202012-23
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                                                https://security.gentoo.org/
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      Severity: Low
         Title: Apache Tomcat: Information disclosure
          Date: December 24, 2020
          Bugs: #758338
            ID: 202012-23
    
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    Synopsis
    ========
    
    A vulnerability has been discovered in Apache Tomcat that allows for
    the disclosure of sensitive information.
    
    Background
    ==========
    
    Apache Tomcat is a Servlet-3.0/JSP-2.2 Container.
    
    Affected packages
    =================
    
         -------------------------------------------------------------------
          Package              /     Vulnerable     /            Unaffected
         -------------------------------------------------------------------
       1  www-servers/tomcat         < 8.5.60:8.5            >= 8.5.60:8.5
                                      < 9.0.40:9               >= 9.0.40:9
    
    Description
    ===========
    
    It was discovered that Apache Tomcat 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.
    
    Impact
    ======
    
    A remote attacker, by sending well-timed HTTP/2 requests, could
    possibly obtain sensitive information.
    
    Workaround
    ==========
    
    Disable HTTP/2 support.
    
    Resolution
    ==========
    
    All Apache Tomcat 8.5.x users should upgrade to the latest version:
    
       # emerge --sync
       # emerge --ask --oneshot --verbose ">=www-servers/tomcat-8.5.60:8.5"
    
    All Apache Tomcat 9.x users should upgrade to the latest version:
    
       # emerge --sync
       # emerge --ask --oneshot --verbose ">=www-servers/tomcat-9.0.40:9"
    
    References
    ==========
    
    [ 1 ] CVE-2020-17527
           https://nvd.nist.gov/vuln/detail/CVE-2020-17527
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
      https://security.gentoo.org/glsa/202012-23
    
    Concerns?
    =========
    
    Security is a primary focus of Gentoo Linux and ensuring the
    confidentiality and security of our users' machines is of utmost
    importance to us. Any security concerns should be addressed to
    This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at
    https://bugs.gentoo.org.
    
    License
    =======
    
    Copyright 2020 Gentoo Foundation, Inc; referenced text
    belongs to its owner(s).
    
    The contents of this document are licensed under the
    Creative Commons - Attribution / Share Alike license.
    
    https://creativecommons.org/licenses/by-sa/2.5
    
    

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