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    ArchLinux: 202101-21: coturn: insufficient validation

    Date 15 Jan 2021
    Posted By LinuxSecurity Advisories
    The package coturn before version 4.5.2-1 is vulnerable to insufficient validation.
    Arch Linux Security Advisory ASA-202101-21
    Severity: High
    Date    : 2021-01-12
    CVE-ID  : CVE-2020-26262
    Package : coturn
    Type    : insufficient validation
    Remote  : Yes
    Link    :
    The package coturn before version 4.5.2-1 is vulnerable to insufficient
    Upgrade to 4.5.2-1.
    # pacman -Syu "coturn>=4.5.2-1"
    The problem has been fixed upstream in version 4.5.2.
    A security issue was found in coturn before version 4.5.2. By default
    coturn does not allow peers to connect and relay packets to loopback
    addresses in the range of 127.x.x.x. However, it was observed that when
    sending a CONNECT request with the XOR-PEER-ADDRESS value of, a
    successful response was received and subsequently, CONNECTIONBIND also
    received a successful response. Coturn then is able to relay packets to
    the loopback interface. Additionally, when coturn is listening on IPv6,
    which is default, the loopback interface can also be reached by making
    use of either [::1] or [::] as the peer address.
    A malicious attacker might relay packets to the loopback interface due
    to insufficient validation of the connection.

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