{"cve":{"cve_id":"CVE-2001-1244","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.35293,"epss_percentile":0.98234,"epss_as_of":"2026-06-23","description":"Multiple TCP implementations could allow remote attackers to cause a denial of service (bandwidth and CPU exhaustion) by setting the maximum segment size (MSS) to a very small number and requesting large amounts of data, which generates more packets with less TCP-level data that amplify network traffic and consume more server CPU to process.","published_at":"2002-05-03T04:00:00Z","last_modified_at":"2026-06-16T21:55:53.067000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["http://www.securityfocus.com/archive/1/195457","https://exchange.xforce.ibmcloud.com/vulnerabilities/6824","http://www.securityfocus.com/bid/2997"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:02:17.764155Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"freebsd","vendor_name":"FreeBSD","product_slug":"freebsd","product_name":"FreeBSD","version_start":"4.3","version_start_inclusive":true,"version_end":"4.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:freebsd:freebsd:4.3:*:*:*:*:*:*:*"},{"vendor_slug":"hp","vendor_name":"HP","product_slug":"hp-ux","product_name":"hp-ux","version_start":"11.00","version_start_inclusive":true,"version_end":"11.00","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:hp:hp-ux:11.00:*:*:*:*:*:*:*"},{"vendor_slug":"hp","vendor_name":"HP","product_slug":"hp-ux","product_name":"hp-ux","version_start":"11.0.4","version_start_inclusive":true,"version_end":"11.0.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:hp:hp-ux:11.0.4:*:*:*:*:*:*:*"},{"vendor_slug":"hp","vendor_name":"HP","product_slug":"hp-ux","product_name":"hp-ux","version_start":"11.11","version_start_inclusive":true,"version_end":"11.11","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:hp:hp-ux:11.11:*:*:*:*:*:*:*"},{"vendor_slug":"hp","vendor_name":"HP","product_slug":"vvos","product_name":"vvos","version_start":"11.04","version_start_inclusive":true,"version_end":"11.04","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:hp:vvos:11.04:*:*:*:*:*:*:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux-kernel","product_name":"Linux kernel","version_start":"2.4.0","version_start_inclusive":true,"version_end":"2.4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:linux:linux_kernel:2.4.0:*:*:*:*:*:*:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux-kernel","product_name":"Linux kernel","version_start":"2.4.1","version_start_inclusive":true,"version_end":"2.4.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:linux:linux_kernel:2.4.1:*:*:*:*:*:*:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux-kernel","product_name":"Linux kernel","version_start":"2.4.2","version_start_inclusive":true,"version_end":"2.4.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:linux:linux_kernel:2.4.2:*:*:*:*:*:*:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux-kernel","product_name":"Linux kernel","version_start":"2.4.3","version_start_inclusive":true,"version_end":"2.4.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:linux:linux_kernel:2.4.3:*:*:*:*:*:*:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux-kernel","product_name":"Linux kernel","version_start":"2.4.4","version_start_inclusive":true,"version_end":"2.4.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:linux:linux_kernel:2.4.4:*:*:*:*:*:*:*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux-kernel","product_name":"Linux kernel","version_start":"2.4.5","version_start_inclusive":true,"version_end":"2.4.5","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:linux:linux_kernel:2.4.5:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-2000","product_name":"windows_2000","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:microsoft:windows_2000:*:*:workstation:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-2000","product_name":"windows_2000","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-2000","product_name":"windows_2000","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp1:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp2:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp3:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp4:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp5:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp6:*:*:*:*:*:*"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-nt","product_name":"windows_nt","version_start":"4.0","version_start_inclusive":true,"version_end":"4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:*:*:*:*:*:*"},{"vendor_slug":"netbsd","vendor_name":"NetBSD","product_slug":"netbsd","product_name":"netbsd","version_start":"1.5","version_start_inclusive":true,"version_end":"1.5","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:netbsd:netbsd:1.5:*:*:*:*:*:*:*"},{"vendor_slug":"netbsd","vendor_name":"NetBSD","product_slug":"netbsd","product_name":"netbsd","version_start":"1.5.1","version_start_inclusive":true,"version_end":"1.5.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:netbsd:netbsd:1.5.1:*:*:*:*:*:*:*"},{"vendor_slug":"openbsd","vendor_name":"OpenBSD","product_slug":"openbsd","product_name":"OpenBSD","version_start":"2.8","version_start_inclusive":true,"version_end":"2.8","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:openbsd:openbsd:2.8:*:*:*:*:*:*:*"},{"vendor_slug":"openbsd","vendor_name":"OpenBSD","product_slug":"openbsd","product_name":"OpenBSD","version_start":"2.9","version_start_inclusive":true,"version_end":"2.9","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:*"},{"vendor_slug":"sun","vendor_name":"sun","product_slug":"sunos","product_name":"sunos","version_start":"5.5.1","version_start_inclusive":true,"version_end":"5.5.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:sun:sunos:5.5.1:*:*:*:*:*:*:*"},{"vendor_slug":"sun","vendor_name":"sun","product_slug":"sunos","product_name":"sunos","version_start":"5.7","version_start_inclusive":true,"version_end":"5.7","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:sun:sunos:5.7:*:*:*:*:*:*:*"},{"vendor_slug":"sun","vendor_name":"sun","product_slug":"sunos","product_name":"sunos","version_start":"5.8","version_start_inclusive":true,"version_end":"5.8","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:sun:sunos:5.8:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://www.securityfocus.com/archive/1/195457","source_type":"MISC","tags":[]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/6824","source_type":"MISC","tags":[]},{"url":"http://www.securityfocus.com/bid/2997","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2002-05-03T04:00:00Z","label":"CVE published","source":null}]}