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Resource Consumption\nAlgorithmic complexity vulnerability in the `ssl.match_hostname` function and unspecified versions of python-backports-ssl_match_hostname as used for older Python versions, allows remote attackers to cause a denial of service (CPU consumption) via multiple wildcard characters in the common name in a 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This parsing occurs in the event loop thread and may block the processing of other requests.\n\nSee also CVE-2024-7592 for a similar vulnerability in cpython.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-52804.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-52804.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-52804","reference_id":"","reference_type":"","scores":[{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30691","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30737","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30781","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30778","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30746","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30688","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.30869","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00118","scoring_system":"epss","scoring_elements":"0.3082","published_at":"2026-04-02T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-52804"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-52804","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-52804"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/tornadoweb/tornado","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/tornadoweb/tornado"},{"reference_url":"https://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-11-25T17:54:41Z/"}],"url":"https://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533"},{"reference_url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3c","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-11-25T17:54:41Z/"}],"url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3c"},{"reference_url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00000.html","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00000.html"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52804","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52804"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088112","reference_id":"1088112","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088112"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2328045","reference_id":"2328045","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2328045"},{"reference_url":"https://github.com/advisories/GHSA-7pwv-g7hj-39pr","reference_id":"GHSA-7pwv-g7hj-39pr","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-11-25T17:54:41Z/"}],"url":"https://github.com/advisories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ities":[{"vulnerability":"VCID-be89-uuxa-fyb5"},{"vulnerability":"VCID-nq24-395d-wuar"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/python-tornado@6.5.4-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/936843?format=json","purl":"pkg:deb/debian/python-tornado@6.5.5-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/python-tornado@6.5.5-1%3Fdistro=trixie"}],"aliases":["CVE-2024-52804","GHSA-8w49-h785-mj3c"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-3y8v-vsd8-ubba"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/30391?format=json","vulnerability_id":"VCID-62bx-a5uf-j3b4","summary":"Tornado vulnerable to excessive logging caused by malformed multipart form data\n### Summary\n\nWhen Tornado's ``multipart/form-data`` parser encounters certain errors, it logs a warning but continues trying to parse the remainder of the data. This allows remote attackers to generate an extremely high volume of logs, constituting a DoS attack. This DoS is compounded by the fact that the logging subsystem is synchronous.\n\n### Affected versions\n\nAll versions of Tornado prior to 6.5 are affected. The vulnerable parser is enabled by default.\n\n### Solution\n\nUpgrade to Tornado version 6.5. In the meantime, risk can be mitigated by blocking `Content-Type: multipart/form-data` in a proxy.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-47287.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-47287.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-47287","reference_id":"","reference_type":"","scores":[{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78614","published_at":"2026-04-13T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78571","published_at":"2026-04-02T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78603","published_at":"2026-04-04T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78584","published_at":"2026-04-07T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78609","published_at":"2026-04-08T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78616","published_at":"2026-04-09T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.7864","published_at":"2026-04-11T12:55:00Z"},{"value":"0.01164","scoring_system":"epss","scoring_elements":"0.78622","published_at":"2026-04-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-47287"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-47287","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-47287"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/tornadoweb/tornado","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/tornadoweb/tornado"},{"reference_url":"https://github.com/tornadoweb/tornado/commit/b39b892bf78fe8fea01dd45199aa88307e7162f3","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-05-16T13:36:22Z/"}],"url":"https://github.com/tornadoweb/tornado/commit/b39b892bf78fe8fea01dd45199aa88307e7162f3"},{"reference_url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-7cx3-6m66-7c5m","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-05-16T13:36:22Z/"}],"url":"https://github.com/tornadoweb/tornado/security/advisories/GHSA-7cx3-6m66-7c5m"},{"reference_url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00038.html","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00038.html"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-47287","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-47287"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1105886","reference_id":"1105886","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1105886"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2366703","reference_id":"2366703","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2366703"},{"reference_url":"https://github.com/advisories/GHSA-7cx3-6m66-7c5m","reference_id":"GHSA-7cx3-6m66-7c5m","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-7cx3-6m66-7c5m"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:8135","reference_id":"RHSA-2025:8135","reference_type":"","scores":[],"url":"h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