{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-6857",
        "ASSIGNER": "security@mozilla.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary. \n*This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.* This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Symlinks may resolve to smaller than expected buffers"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Mozilla",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Firefox ESR",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "unspecified",
                                            "version_value": "115.6"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Thunderbird",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "unspecified",
                                            "version_value": "115.6"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Firefox",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "unspecified",
                                            "version_value": "121"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1796023",
                "refsource": "MISC",
                "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1796023"
            },
            {
                "url": "https://www.mozilla.org/security/advisories/mfsa2023-54/",
                "refsource": "MISC",
                "name": "https://www.mozilla.org/security/advisories/mfsa2023-54/"
            },
            {
                "url": "https://www.mozilla.org/security/advisories/mfsa2023-55/",
                "refsource": "MISC",
                "name": "https://www.mozilla.org/security/advisories/mfsa2023-55/"
            },
            {
                "url": "https://www.mozilla.org/security/advisories/mfsa2023-56/",
                "refsource": "MISC",
                "name": "https://www.mozilla.org/security/advisories/mfsa2023-56/"
            },
            {
                "url": "https://www.debian.org/security/2023/dsa-5581",
                "refsource": "MISC",
                "name": "https://www.debian.org/security/2023/dsa-5581"
            },
            {
                "url": "https://www.debian.org/security/2023/dsa-5582",
                "refsource": "MISC",
                "name": "https://www.debian.org/security/2023/dsa-5582"
            },
            {
                "url": "https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html",
                "refsource": "MISC",
                "name": "https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html"
            },
            {
                "url": "https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html",
                "refsource": "MISC",
                "name": "https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html"
            },
            {
                "url": "https://security.gentoo.org/glsa/202401-10",
                "refsource": "MISC",
                "name": "https://security.gentoo.org/glsa/202401-10"
            }
        ]
    },
    "credits": [
        {
            "lang": "en",
            "value": "Jed Davis"
        }
    ]
}