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    Debian: DSA-3900-1: openvpn security update

    Date
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    Several issues were discovered in openvpn, a virtual private network application. CVE-2017-7479
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-3900-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                       Sebastien Delafond
    June 27, 2017                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : openvpn
    CVE ID         : CVE-2017-7479 CVE-2017-7508 CVE-2017-7520 CVE-2017-7521
    Debian Bug     : 865480
    
    Several issues were discovered in openvpn, a virtual private network
    application.
    
    CVE-2017-7479
    
        It was discovered that openvpn did not properly handle the
        rollover of packet identifiers. This would allow an authenticated
        remote attacker to cause a denial-of-service via application
        crash.
    
    CVE-2017-7508
    
        Guido Vranken discovered that openvpn did not properly handle
        specific malformed IPv6 packets. This would allow a remote
        attacker to cause a denial-of-service via application crash.
    
    CVE-2017-7520
    
        Guido Vranken discovered that openvpn did not properly handle
        clients connecting to an HTTP proxy with NTLMv2
        authentication. This would allow a remote attacker to cause a
        denial-of-service via application crash, or potentially leak
        sensitive information like the user's proxy password.
    
    CVE-2017-7521
    
        Guido Vranken discovered that openvpn did not properly handle
        some x509 extensions. This would allow a remote attacker to cause
        a denial-of-service via application crash.
    
    For the oldstable distribution (jessie), these problems have been fixed
    in version 2.3.4-5+deb8u2.
    
    For the stable distribution (stretch), these problems have been fixed in
    version 2.4.0-6+deb9u1.
    
    For the testing distribution (buster), these problems have been fixed
    in version 2.4.3-1.
    
    For the unstable distribution (sid), these problems have been fixed in
    version 2.4.3-1.
    
    We recommend that you upgrade your openvpn packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    

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