{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-26720",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://packages.debian.org/buster/avahi-daemon",
                "refsource": "MISC",
                "name": "https://packages.debian.org/buster/avahi-daemon"
            },
            {
                "url": "https://packages.debian.org/sid/avahi-daemon",
                "refsource": "MISC",
                "name": "https://packages.debian.org/sid/avahi-daemon"
            },
            {
                "url": "https://packages.debian.org/bullseye/avahi-daemon",
                "refsource": "MISC",
                "name": "https://packages.debian.org/bullseye/avahi-daemon"
            },
            {
                "url": "https://security-tracker.debian.org/tracker/CVE-2021-26720",
                "refsource": "MISC",
                "name": "https://security-tracker.debian.org/tracker/CVE-2021-26720"
            },
            {
                "url": "https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824",
                "refsource": "MISC",
                "name": "https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824"
            },
            {
                "url": "https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog",
                "refsource": "MISC",
                "name": "https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog"
            },
            {
                "refsource": "MISC",
                "name": "https://www.openwall.com/lists/oss-security/2021/02/15/2",
                "url": "https://www.openwall.com/lists/oss-security/2021/02/15/2"
            },
            {
                "refsource": "MISC",
                "name": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796",
                "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796"
            },
            {
                "refsource": "MISC",
                "name": "https://bugzilla.suse.com/show_bug.cgi?id=1180827",
                "url": "https://bugzilla.suse.com/show_bug.cgi?id=1180827"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20220607 [SECURITY] [DLA 3047-1] avahi security update",
                "url": "https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html"
            }
        ]
    }
}