cvelist/2020/25xxx/CVE-2020-25683.json

{
    "data_type": "CVE",
    "data_format": "MITRE",
    "data_version": "4.0",
    "CVE_data_meta": {
        "ID": "CVE-2020-25683",
        "ASSIGNER": "secalert@redhat.com",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "n/a",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "dnsmasq",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "dnsmasq 2.83"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-122"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "name": "https://www.jsof-tech.com/disclosures/dnspooq/",
                "url": "https://www.jsof-tech.com/disclosures/dnspooq/"
            },
            {
                "refsource": "MISC",
                "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1882018",
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1882018"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-84440e87ba",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202101-17",
                "url": "https://security.gentoo.org/glsa/202101-17"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4844",
                "url": "https://www.debian.org/security/2021/dsa-4844"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-2e4c3d5a9d",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210322 [SECURITY] [DLA 2604-1] dnsmasq security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html"
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability."
            }
        ]
    }
}