Linux Security
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    Linux Security

    Debian: DSA-4774-1: linux security update

    Date 19 Oct 2020
    277
    Posted By LinuxSecurity Advisories
    Several vulnerabilities have been discovered in the Linux kernel that may lead to the execution of arbitrary code, privilege escalation, denial of service or information leaks.
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-4774-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    October 19, 2020                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : linux
    CVE ID         : CVE-2020-12351 CVE-2020-12352 CVE-2020-25211 CVE-2020-25643
                     CVE-2020-25645
    Debian Bug     : 908712
    
    Several vulnerabilities have been discovered in the Linux kernel that
    may lead to the execution of arbitrary code, privilege escalation,
    denial of service or information leaks.
    
    CVE-2020-12351
    
        Andy Nguyen discovered a flaw in the Bluetooth implementation in the
        way L2CAP packets with A2MP CID are handled. A remote attacker in
        short distance knowing the victim's Bluetooth device address can
        send a malicious l2cap packet and cause a denial of service or
        possibly arbitrary code execution with kernel privileges.
    
    CVE-2020-12352
    
        Andy Nguyen discovered a flaw in the Bluetooth implementation. Stack
        memory is not properly initialised when handling certain AMP
        packets. A remote attacker in short distance knowing the victim's
        Bluetooth device address address can retrieve kernel stack
        information.
    
    CVE-2020-25211
    
        A flaw was discovered in netfilter subsystem. A local attacker
        able to inject conntrack Netlink configuration can cause a denial
        of service.
    
    CVE-2020-25643
    
        ChenNan Of Chaitin Security Research Lab discovered a flaw in the
        hdlc_ppp module. Improper input validation in the ppp_cp_parse_cr()
        function may lead to memory corruption and information disclosure.
    
    CVE-2020-25645
    
        A flaw was discovered in the interface driver for GENEVE
        encapsulated traffic when combined with IPsec. If IPsec is
        configured to encrypt traffic for the specific UDP port used by the
        GENEVE tunnel, tunneled data isn't correctly routed over the
        encrypted link and sent unencrypted instead.
    
    For the stable distribution (buster), these problems have been fixed in
    version 4.19.152-1. The vulnerabilities are fixed by rebasing to the new
    stable upstream version 4.19.152 which includes additional bugfixes.
    
    We recommend that you upgrade your linux packages.
    
    For the detailed security status of linux please refer to its security
    tracker page at:
    https://security-tracker.debian.org/tracker/linux
    
    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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