{"id":"CVE-2025-3677","state":"PUBLISHED","title":"lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization","description":"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.","publishedAt":"2025-04-16T08:31:04.475Z","updatedAt":"2025-04-21T11:28:25.222Z","severity":{"score":4.8,"label":"Medium","version":"4.0","vector":"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","source":"VulDB"},"assigner":"VulDB","products":["lm-sys fastchat"],"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"}]}],"references":["https://vuldb.com/?id.304966","https://vuldb.com/?ctiid.304966","https://vuldb.com/?submit.552755","https://github.com/lm-sys/FastChat/issues/3713"],"weaknesses":["CWE-502","CWE-20"],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/3xxx/CVE-2025-3677.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-3677","state":"PUBLISHED","datePublished":"2025-04-16T08:31:04.475Z","dateUpdated":"2025-04-21T11:28:25.222Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2025-04-16T01:03:15.592Z"},"containers":{"cna":{"title":"lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization","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."}],"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"}]}],"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"]}],"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","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":5.3,"vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":4.3,"vectorString":"AV:L/AC:L/Au:S/C:P/I:P/A:P"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","type":"CWE","lang":"en","description":"Deserialization"}]},{"descriptions":[{"cweId":"CWE-20","type":"CWE","lang":"en","description":"Improper Input Validation"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2025-04-21T11:28:25.222Z"},"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"},{"lang":"en","value":"ybdesire (VulDB User)","type":"analyst"}]},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-16T19:30:23.078Z"}}]}}}