CVE-2021-33620

CVSS V2 Medium 4 CVSS V3 Medium 6.5
Description
Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
Overview
  • CVE ID
  • CVE-2021-33620
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-05-28T12:15:07
  • Last Modified Date
  • 2022-06-03T17:30:46
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* 1 OR 4.15
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* 1 OR 5.0 5.0.6
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:S/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f Patch Third Party Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-1e05a85bd28c22c9ca5d3ac9f5e86d6269ec0a8c.patch Mailing List Patch Vendor Advisory
http://www.squid-cache.org/Versions/v5/changesets/squid-5-8af775ed98bfd610f9ce762fe177e01b2675588c.patch Mailing List Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-33620
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33620
History
Created Old Value New Value Data Type Notes
2022-05-10 07:11:51 Added to TrackCVE
2022-12-05 03:14:05 2021-05-28T12:15Z 2021-05-28T12:15:07 CVE Published Date updated
2022-12-05 03:14:05 2022-06-03T17:30:46 CVE Modified Date updated
2022-12-05 03:14:05 Analyzed Vulnerability Status updated