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    Debian: DSA-4855-1: openssl security update

    Date 17 Feb 2021
    171
    Posted By LinuxSecurity Advisories
    Multiple vulnerabilities have been discovered in OpenSSL, a Secure Sockets Layer toolkit. An overflow bug in the x64_64 Montgomery squaring procedure, an integer overflow in CipherUpdate and a NULL pointer dereference flaw X509_issuer_and_serial_hash() were found, which could
    
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    Debian Security Advisory DSA-4855-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    February 17, 2021                     https://www.debian.org/security/faq
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    Package        : openssl
    CVE ID         : CVE-2019-1551 CVE-2021-23840 CVE-2021-23841
    Debian Bug     : 947949
    
    Multiple vulnerabilities have been discovered in OpenSSL, a Secure
    Sockets Layer toolkit. An overflow bug in the x64_64 Montgomery squaring
    procedure, an integer overflow in CipherUpdate and a NULL pointer
    dereference flaw X509_issuer_and_serial_hash() were found, which could
    result in denial of service.
    
    Additional details can be found in the upstream advisories
    https://www.openssl.org/news/secadv/20191206.txt and
    https://www.openssl.org/news/secadv/20210216.txt .
    
    For the stable distribution (buster), these problems have been fixed in
    version 1.1.1d-0+deb10u5.
    
    We recommend that you upgrade your openssl packages.
    
    For the detailed security status of openssl please refer to its security
    tracker page at:
    https://security-tracker.debian.org/tracker/openssl
    
    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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