Debian: DSA-4697-1: gnutls28 security update

    Date 06 Jun 2020
    146
    Posted By LinuxSecurity Advisories
    A flaw was reported in the TLS session ticket key construction in GnuTLS, a library implementing the TLS and SSL protocols. The flaw caused the TLS server to not securely construct a session ticket encryption key considering the application supplied secret, allowing a
    
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    Debian Security Advisory DSA-4697-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    June 06, 2020                         https://www.debian.org/security/faq
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    Package        : gnutls28
    CVE ID         : CVE-2020-13777
    Debian Bug     : 962289
    
    A flaw was reported in the TLS session ticket key construction in
    GnuTLS, a library implementing the TLS and SSL protocols. The flaw
    caused the TLS server to not securely construct a session ticket
    encryption key considering the application supplied secret, allowing a
    man-in-the-middle attacker to bypass authentication in TLS 1.3 and
    recover previous conversations in TLS 1.2.
    
    For the stable distribution (buster), this problem has been fixed in
    version 3.6.7-4+deb10u4.
    
    We recommend that you upgrade your gnutls28 packages.
    
    For the detailed security status of gnutls28 please refer to its
    security tracker page at:
    https://security-tracker.debian.org/tracker/gnutls28
    
    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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