Stack-based buffer overflow in the evutilparsesockaddrport function in evutil.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (segmentation fault) via vectors involving a long string in brackets in the ipas_string argument.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "53.0+build6-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "53.0+build6-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-globalmenu",
            "binary_version": "53.0+build6-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "53.0+build6-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-testsuite",
            "binary_version": "53.0+build6-0ubuntu0.14.04.1"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libevent-2.0-5",
            "binary_version": "2.0.21-stable-1ubuntu1.14.04.2"
        },
        {
            "binary_name": "libevent-core-2.0-5",
            "binary_version": "2.0.21-stable-1ubuntu1.14.04.2"
        },
        {
            "binary_name": "libevent-dev",
            "binary_version": "2.0.21-stable-1ubuntu1.14.04.2"
        },
        {
            "binary_name": "libevent-extra-2.0-5",
            "binary_version": "2.0.21-stable-1ubuntu1.14.04.2"
        },
        {
            "binary_name": "libevent-openssl-2.0-5",
            "binary_version": "2.0.21-stable-1ubuntu1.14.04.2"
        },
        {
            "binary_name": "libevent-pthreads-2.0-5",
            "binary_version": "2.0.21-stable-1ubuntu1.14.04.2"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "thunderbird",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-dev",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-globalmenu",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-testsuite",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:52.1.1+build1-0ubuntu0.14.04.1"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "53.0+build6-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "53.0+build6-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-globalmenu",
            "binary_version": "53.0+build6-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "53.0+build6-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-testsuite",
            "binary_version": "53.0+build6-0ubuntu0.16.04.1"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libevent-2.0-5",
            "binary_version": "2.0.21-stable-2ubuntu0.16.04.1"
        },
        {
            "binary_name": "libevent-core-2.0-5",
            "binary_version": "2.0.21-stable-2ubuntu0.16.04.1"
        },
        {
            "binary_name": "libevent-dev",
            "binary_version": "2.0.21-stable-2ubuntu0.16.04.1"
        },
        {
            "binary_name": "libevent-extra-2.0-5",
            "binary_version": "2.0.21-stable-2ubuntu0.16.04.1"
        },
        {
            "binary_name": "libevent-openssl-2.0-5",
            "binary_version": "2.0.21-stable-2ubuntu0.16.04.1"
        },
        {
            "binary_name": "libevent-pthreads-2.0-5",
            "binary_version": "2.0.21-stable-2ubuntu0.16.04.1"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "thunderbird",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-dev",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-globalmenu",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-testsuite",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:52.1.1+build1-0ubuntu0.16.04.1"
        }
    ]
}