{
    "data_type": "CVE",
    "data_format": "MITRE",
    "data_version": "4.0",
    "CVE_data_meta": {
        "ID": "CVE-2021-3657",
        "ASSIGNER": "patrick@puiterwijk.org",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "n/a",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "isync",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "isync 1.4.4"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-119"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2028932",
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2028932"
            },
            {
                "refsource": "MISC",
                "name": "https://www.openwall.com/lists/oss-security/2021/12/03/1",
                "url": "https://www.openwall.com/lists/oss-security/2021/12/03/1"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20220701 [SECURITY] [DLA 3066-1] isync security update",
                "url": "https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202208-15",
                "url": "https://security.gentoo.org/glsa/202208-15"
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders, could cause several different buffer overflows, which could conceivably be exploited for remote code execution."
            }
        ]
    }
}