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{"affected_release": [{"advisory": "RHSA-2020:4082", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "squid-7:3.5.20-17.el7_9.4", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-30T00:00:00Z"}, {"advisory": "RHSA-2020:3623", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "squid:4-8020020200827100059.4cda2c84", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-09-03T00:00:00Z"}, {"advisory": "RHSA-2020:3623", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "squid:4-8000020200827105727.f8e95b4e", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-09-03T00:00:00Z"}, {"advisory": "RHSA-2020:3623", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "squid:4-8010020200827104751.c27ad7f8", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-09-03T00:00:00Z"}], "bugzilla": {"description": "squid: HTTP Request Splitting could result in cache poisoning", "id": "1871702", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1871702"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "status": "verified"}, "cwe": "CWE-444", "details": ["An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Splitting attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the browser cache and any downstream caches with content from an arbitrary source. Squid uses a string search instead of parsing the Transfer-Encoding header to find chunked encoding. This allows an attacker to hide a second request inside Transfer-Encoding: it is interpreted by Squid as chunked and split out into a second request delivered upstream. Squid will then deliver two distinct responses to the client, corrupting any downstream caches.", "A flaw was found in squid. Due to incorrect data validation, an HTTP Request Splitting attack against HTTP and HTTPS traffic is possible leading to cache poisoning. The highest threat from this vulnerability is to data confidentiality and integrity."], "mitigation": {"lang": "en:us", "value": "Disable the relaxed HTTP parser in `squid.conf`:\n```\nrelaxed_header_parser off\n```"}, "name": "CVE-2020-15811", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "squid", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "squid34", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2020-08-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-15811\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-15811"], "threat_severity": "Important", "upstream_fix": "squid 4.13, squid 5.0.4"}