{
  "threat_severity" : "Important",
  "public_date" : "2020-09-04T00:00:00Z",
  "bugzilla" : {
    "description" : "squid: improper input validation may allow a trusted client to perform HTTP request smuggling",
    "id" : "1939925",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1939925"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.6",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-444",
  "details" : [ "An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.", "A flaw was found in squid. Due to improper validation while parsing the request URI, squid is vulnerable to HTTP request smuggling. This issue could allow a trusted client to perform an HTTP request smuggling attack and access services otherwise forbidden by squid. The highest threat from this vulnerability is to data confidentiality." ],
  "statement" : "This flaw is not tied to a specific proxy type (e.g., forward or reverse) and has been rated as having a security impact of Important. This flaw affects the versions of Squid as shipped with Red Hat Enterprise Linux 7 and 8, and is not currently planned to be addressed in future updates of Red Hat Enterprise Linux 6. Red Hat Enterprise Linux 6 is now in Extended Life Phase of the support and maintenance life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2021-04-08T00:00:00Z",
    "advisory" : "RHSA-2021:1135",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "squid-7:3.5.20-17.el7_9.6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2021-05-18T00:00:00Z",
    "advisory" : "RHSA-2021:1979",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "squid:4-8040020210420090912.522a0ee4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Extended Update Support",
    "release_date" : "2021-05-19T00:00:00Z",
    "advisory" : "RHSA-2021:2025",
    "cpe" : "cpe:/a:redhat:rhel_eus:8.1",
    "package" : "squid:4-8010020210401091540.c27ad7f8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Extended Update Support",
    "release_date" : "2021-05-19T00:00:00Z",
    "advisory" : "RHSA-2021:2025",
    "cpe" : "cpe:/a:redhat:rhel_eus:8.2",
    "package" : "squid:4-8020020210401090524.4cda2c84"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "squid",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "squid34",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "squid",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2020-25097\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-25097\nhttps://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6" ],
  "name" : "CVE-2020-25097",
  "mitigation" : {
    "value" : "This flaw can be mitigated by setting the `uri_whitespace` directive in squid.conf to either: \n```\nuri_whitespace deny\n```\nor\n```\nuri_whitespace encode\n```",
    "lang" : "en:us"
  },
  "csaw" : false
}