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[SECURITY] [DLA 2417-1] linux-4.19 security update

Debian LTS Advisory DLA-2417-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                        Ben Hutchings
October 27, 2020                              https://wiki.debian.org/LTS

Package        : linux-4.19
Version        : 4.19.152-1~deb9u1
CVE ID         : CVE-2020-12351 CVE-2020-12352 CVE-2020-25211 CVE-2020-25643 
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.


    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.


    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


    A flaw was discovered in netfilter subsystem. A local attacker
    able to inject conntrack Netlink configuration can cause a denial
    of service.


    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.


    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 Debian 9 stretch, these problems have been fixed in version

We recommend that you upgrade your linux-4.19 packages.

For the detailed security status of linux-4.19 please refer to
its security tracker page at:

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

Ben Hutchings - Debian developer, member of kernel, installer and LTS teams

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