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    Gentoo: GLSA-202012-22: HAProxy: Arbitrary code execution

    Date 24 Dec 2020
    507
    Posted By LinuxSecurity Advisories
    A buffer overflow in HAProxy might allow an attacker to execute arbitrary code.
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    Gentoo Linux Security Advisory                           GLSA 202012-22
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                                                https://security.gentoo.org/
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      Severity: Normal
         Title: HAProxy: Arbitrary code execution
          Date: December 24, 2020
          Bugs: #715944
            ID: 202012-22
    
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    Synopsis
    ========
    
    A buffer overflow in HAProxy might allow an attacker to execute
    arbitrary code.
    
    Background
    ==========
    
    HAProxy is a TCP/HTTP reverse proxy for high availability environments.
    
    Affected packages
    =================
    
         -------------------------------------------------------------------
          Package              /     Vulnerable     /            Unaffected
         -------------------------------------------------------------------
       1  net-proxy/haproxy            < 2.1.4             >= 2.0.13:0/2.0
                                                                  >= 2.1.4
    
    Description
    ===========
    
    It was discovered that HAProxy incorrectly handled certain HTTP/2
    headers.
    
    Impact
    ======
    
    A remote attacker, by sending a specially crafted HTTP/2 request, could
    possibly execute arbitrary code with the privileges of the process, or
    cause a Denial of Service condition.
    
    Workaround
    ==========
    
    Disable HTTP/2 support.
    
    Resolution
    ==========
    
    All HAProxy 2.0.x users should upgrade to the latest version:
    
       # emerge --sync
       # emerge --ask --oneshot --verbose ">=net-proxy/haproxy-2.0.13:0/2.0"
    
    All other HAProxy users should upgrade to the latest version:
    
       # emerge --sync
       # emerge --ask --oneshot --verbose ">=net-proxy/haproxy-2.1.4"
    
    References
    ==========
    
    [ 1 ] CVE-2020-11100
           https://nvd.nist.gov/vuln/detail/CVE-2020-11100
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
      https://security.gentoo.org/glsa/202012-22
    
    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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