CVE-2022-45060

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Varnish Cache 5.x and 6.x before 6.0.11, 7.x before 7.1.2, and 7.2.x before 7.2.1. An attacker may introduce characters through HTTP/2 pseudo-headers that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This could, in turn, be used to exploit vulnerabilities in a server behind the Varnish server. Note: the 6.0.x LTS series (before 6.0.11) is affected."}, {"lang": "es", "value": "Se descubri\u00f3 un problema de HTTP Request Forgery en Varnish Cache 5.x y 6.x anteriores a 6.0.11, 7.x anteriores a 7.1.2 y 7.2.x anteriores a 7.2.1. Un atacante puede introducir caracteres a trav\u00e9s de pseudoencabezados HTTP/2 que no son v\u00e1lidos en el contexto de una l\u00ednea de solicitud HTTP/1, lo que hace que el servidor Varnish produzca solicitudes HTTP/1 no v\u00e1lidas al backend. Esto, a su vez, podr\u00eda usarse para explotar vulnerabilidades en un servidor detr\u00e1s del servidor Varnish. Nota: la serie 6.0.x LTS (anterior a 6.0.11) se ve afectada."}], "id": "CVE-2022-45060", "lastModified": "2026-06-17T05:09:16.077", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-45060", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-05-01T14:28:14.149747Z", "version": "2.0.3"}}]}, "published": "2022-11-09T06:15:09.830", "references": [{"source": "cve@mitre.org", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://docs.varnish-software.com/security/VSV00011"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00036.html"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G6ZMOZVBLZXHEV5VRW4I4SOWLQEK5OF5/"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4KVVCIQVINQQ2D7ORNARSYALMJUMP3I/"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XGF6LFTHXCSYMYUX5HLMVXQH3WHCSFLU/"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://varnish-cache.org/security/VSV00011.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5334"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://docs.varnish-software.com/security/VSV00011"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00036.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G6ZMOZVBLZXHEV5VRW4I4SOWLQEK5OF5/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4KVVCIQVINQQ2D7ORNARSYALMJUMP3I/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XGF6LFTHXCSYMYUX5HLMVXQH3WHCSFLU/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://varnish-cache.org/security/VSV00011.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5334"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-20"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2022:8649", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "varnish:6-8070020221114151716.bd1311ed", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8647", "cpe": "cpe:/a:redhat:rhel_e4s:8.1", "package": "varnish:6-8010020221114160433.c27ad7f8", "product_name": "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8646", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "varnish:6-8020020221114155218.4cda2c84", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8646", "cpe": "cpe:/a:redhat:rhel_tus:8.2", "package": "varnish:6-8020020221114155218.4cda2c84", "product_name": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8646", "cpe": "cpe:/a:redhat:rhel_e4s:8.2", "package": "varnish:6-8020020221114155218.4cda2c84", "product_name": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8645", "cpe": "cpe:/a:redhat:rhel_eus:8.4", "package": "varnish:6-8040020221114153543.522a0ee4", "product_name": "Red Hat Enterprise Linux 8.4 Extended Update Support", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8650", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "varnish:6-8060020221114152527.ad008a3a", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8643", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "varnish-0:6.6.2-2.el9_1.1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2022:8644", "cpe": "cpe:/a:redhat:rhel_eus:9.0", "package": "varnish-0:6.6.2-2.el9_0.1", "product_name": "Red Hat Enterprise Linux 9.0 Extended Update Support", "release_date": "2022-11-28T00:00:00Z"}, {"advisory": "RHSA-2023:0673", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "rh-varnish6-varnish-0:6.0.8-2.el7.2", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7", "release_date": "2023-02-08T00:00:00Z"}], "bugzilla": {"description": "varnish: Request Forgery Vulnerability", "id": "2141844", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2141844"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-918", "details": ["An HTTP Request Forgery issue was discovered in Varnish Cache 5.x and 6.x before 6.0.11, 7.x before 7.1.2, and 7.2.x before 7.2.1. An attacker may introduce characters through HTTP/2 pseudo-headers that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This could, in turn, be used to exploit vulnerabilities in a server behind the Varnish server. Note: the 6.0.x LTS series (before 6.0.11) is affected.", "An HTTP Request Forgery issue was discovered in Varnish Cache. An attacker may introduce characters through HTTP/2 pseudo-headers that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This could be used to exploit vulnerabilities in a server behind the Varnish server."], "mitigation": {"lang": "en:us", "value": "The following mitigation can be applied under the impossibility of update the varnish package:\n1) Add the following snippet under vcl_recv VCL function at /etc/varnish/default.vcl\n~~~\nif (req.url ~ \"(^$)|[ \\t]+\" || req.method ~ \"(^$)|[ \\t]+\") {\nreturn (synth(400));\n}\n~~~\n2) Restart the varnish service by running the following command as a privileged user:\n~~~\nsystemctl restart varnish\n~~~\nThe VCL script above will check by any invalid character or pseudo-header values and when found it will return a synthetic HTTP error code 400."}, "name": "CVE-2022-45060", "public_date": "2022-11-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-45060\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-45060\nhttps://docs.varnish-software.com/security/VSV00011\nhttps://varnish-cache.org/security/VSV00011.html"], "threat_severity": "Important"}

{}