{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2025-3677",
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "state": "PUBLISHED",
        "assignerShortName": "VulDB",
        "dateReserved": "2025-04-16T01:03:15.592Z",
        "datePublished": "2025-04-16T08:31:04.475Z",
        "dateUpdated": "2025-04-21T11:28:25.222Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
                "shortName": "VulDB",
                "dateUpdated": "2025-04-21T11:28:25.222Z"
            },
            "title": "lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-502",
                            "lang": "en",
                            "description": "Deserialization"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-20",
                            "lang": "en",
                            "description": "Improper Input Validation"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "lm-sys",
                    "product": "fastchat",
                    "versions": [
                        {
                            "version": "0.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.5",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.6",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.7",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.8",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.9",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.10",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.11",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.12",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.13",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.14",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.15",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.16",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.17",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.18",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.19",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.20",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.21",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.22",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.23",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.24",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.25",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.26",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.27",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.28",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.29",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.30",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.31",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.32",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.33",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.34",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.35",
                            "status": "affected"
                        },
                        {
                            "version": "0.2.36",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A vulnerability classified as critical was found in lm-sys fastchat up to 0.2.36. This vulnerability affects the function split_files/apply_delta_low_cpu_mem of the file fastchat/model/apply_delta.py. The manipulation leads to deserialization. An attack has to be approached locally."
                },
                {
                    "lang": "de",
                    "value": "In lm-sys fastchat bis 0.2.36 wurde eine Schwachstelle entdeckt. Sie wurde als kritisch eingestuft. Das betrifft die Funktion split_files/apply_delta_low_cpu_mem der Datei fastchat/model/apply_delta.py. Mit der Manipulation mit unbekannten Daten kann eine deserialization-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs hat dabei lokal zu erfolgen."
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "version": "4.0",
                        "baseScore": 4.8,
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
                        "baseSeverity": "MEDIUM"
                    }
                },
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "baseScore": 5.3,
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
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                    "cvssV2_0": {
                        "version": "2.0",
                        "baseScore": 4.3,
                        "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P"
                    }
                }
            ],
            "timeline": [
                {
                    "time": "2025-04-16T00:00:00.000Z",
                    "lang": "en",
                    "value": "Advisory disclosed"
                },
                {
                    "time": "2025-04-16T02:00:00.000Z",
                    "lang": "en",
                    "value": "VulDB entry created"
                },
                {
                    "time": "2025-04-21T13:30:23.000Z",
                    "lang": "en",
                    "value": "VulDB entry last update"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "ybdesire (VulDB User)",
                    "type": "reporter"
                },
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                    "lang": "en",
                    "value": "ybdesire (VulDB User)",
                    "type": "analyst"
                }
            ],
            "references": [
                {
                    "url": "https://vuldb.com/?id.304966",
                    "name": "VDB-304966 | lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization",
                    "tags": [
                        "vdb-entry",
                        "technical-description"
                    ]
                },
                {
                    "url": "https://vuldb.com/?ctiid.304966",
                    "name": "VDB-304966 | CTI Indicators (IOB, IOC, IOA)",
                    "tags": [
                        "signature",
                        "permissions-required"
                    ]
                },
                {
                    "url": "https://vuldb.com/?submit.552755",
                    "name": "Submit #552755 | lm-sys FastChat v0.2.3 to v0.2.36 Deserialization",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://github.com/lm-sys/FastChat/issues/3713",
                    "tags": [
                        "issue-tracking"
                    ]
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-04-16T19:30:12.404331Z",
                                "id": "CVE-2025-3677",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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}