{"id":"CVE-2023-38180","kind":"vulnerability","aliases":["CVE-2023-38180"],"related":[],"title":".NET and Visual Studio Denial of Service Vulnerability","description":"Microsoft .NET Core and Visual Studio contain an unspecified vulnerability that allows for denial-of-service (DoS).\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft .NET Core and Visual Studio contain an unspecified flaw that lets an attacker cause a denial of service. CISA lists it as actively exploited in the wild.","severity":"high","cvss":7.5,"epss":null,"exploited":true,"exploited_at":"2023-08-09T00:00:00+00:00","products":[{"name":"Microsoft .NET Core and Visual Studio","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft .net","fixed":["6.0.21"],"affected":">= 6.0.0, < 6.0.21","ecosystem":"vendor"},{"name":"microsoft .net","fixed":["7.0.10"],"affected":">= 7.0.0, < 7.0.10","ecosystem":"vendor"},{"name":"microsoft asp.net core","fixed":["2.1.40"],"affected":">= 2.1, < 2.1.40","ecosystem":"vendor"},{"name":"microsoft visual studio 2022","fixed":["17.2.18"],"affected":">= 17.2.0, < 17.2.18","ecosystem":"vendor"},{"name":"microsoft visual studio 2022","fixed":["17.4.10"],"affected":">= 17.4.0, < 17.4.10","ecosystem":"vendor"},{"name":"microsoft visual studio 2022","fixed":["17.6.6"],"affected":">= 17.6.0, < 17.6.6","ecosystem":"vendor"},{"name":"fedoraproject fedora","fixed":[],"affected":"= 37","ecosystem":"vendor"},{"name":"fedoraproject fedora","fixed":[],"affected":"= 38","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["dotnet","exploited","runtime","visual-studio","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the mitigations from the vendor instructions, or stop using the affected product if no mitigation is available (per CISA required action).","status":"open","published_at":"2023-08-08T19:15:10+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:04:49+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-10-23T21:04:49Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations from the vendor instructions, or stop using the affected product if no mitigation is available (per CISA required action).","reach":"unknown","impact":"low","summary":"Microsoft .NET Core and Visual Studio contain an unspecified flaw that lets an attacker cause a denial of service. CISA lists it as actively exploited in the wild.","category":"runtime","who_cares":["dotnet","visual-studio","windows"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker crashes or stalls .NET services, causing denial of service","analyst_note":"Find the Microsoft advisory for CVE-2023-38180 to get affected and fixed versions, the exact mitigation, and the attack vector; the sources given do not name them.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000454,"input_tokens":2830,"output_tokens":342,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':10A,13A '-38180':11A,14A '2022':31A,35A,39A 'action':99C 'activ':74B 'allow':90C 'and':18A 'appli':100C 'asp.net':26A 'attack':64B 'caus':65B 'cisa':70B,97C 'contain':57B,85C 'core':17A,27A,53B,81C 'cve':9A,12A 'denial':5A,67B,93C 'denial-of-servic':92C 'discontinu':106C 'dos':96C 'dotnet':44B 'exploit':45B,75B 'fedora':41A,43A 'fedoraproject':40A,42A 'flaw':60B 'instruct':104C 'let':62B 'list':71B 'microsoft':15A,21A,23A,25A,28A,32A,36A,51B,79C 'mitig':101C,112C 'net':1A,16A,22A,24A,52B,80C 'per':102C 'product':110C 'requir':98C 'runtim':46B 'servic':7A,69B,95C 'studio':4A,20A,30A,34A,38A,49B,56B,84C 'unavail':114C 'unspecifi':59B,87C 'use':107C 'vendor':103C 'visual':3A,19A,29A,33A,37A,48B,55B,83C 'visual-studio':47B 'vulner':8A,88C 'wild':78B 'window':50B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-08-08T19:15:10+00:00","kev":{"dateAdded":"2023-08-09","dueDate":"2023-08-30","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-38180","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-38180","severity":null,"published_at":"2023-08-09T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T14:39:39+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-38180","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38180","severity":null,"published_at":"2023-08-08T19:15:10+00:00","modified_at":"2026-08-10T16:18:37+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}