CVE-2019-19331

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).
Overview
  • CVE ID
  • CVE-2019-19331
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-12-16T16:15:11
  • Last Modified Date
  • 2019-12-17T14:14:53
Weakness Enumerations
CWE URL
CWE-404 http://cwe.mitre.org/data/definitions/404.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:* 1 OR 4.3.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331 Exploit Issue Tracking Patch
https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html Release Notes Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-19331
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19331
History
Created Old Value New Value Data Type Notes
2022-05-10 16:57:36 Added to TrackCVE
2022-12-04 07:55:01 2019-12-16T16:15Z 2019-12-16T16:15:11 CVE Published Date updated
2022-12-04 07:55:01 2019-12-17T14:14:53 CVE Modified Date updated
2022-12-04 07:55:01 Analyzed Vulnerability Status updated