Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2019-19331

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).

Published

2019-12-16T16:15:11.660

Last Modified

2024-11-21T04:34:35.420

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-407
  • Type: Primary
    CWE-404
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application nic knot_resolver < 4.3.0 Yes
Operating System debian debian_linux 10.0 Yes
References