Vulnerability Monitor

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CVE-2019-6477

With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).

Published

2019-11-26T16:15:13.963

Last Modified

2024-11-21T04:46:31.597

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: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application isc bind ≤ 9.11.12 Yes
Application isc bind ≤ 9.14.7 Yes
Application isc bind ≤ 9.15.5 Yes
Application isc bind 9.11.5 Yes
Application isc bind 9.11.6 Yes
Application isc bind 9.11.6 Yes
Application isc bind 9.11.12 Yes
Application isc bind 9.12.4 Yes
Application isc bind 9.12.4 Yes
Operating System fedoraproject fedora 30 Yes
Operating System fedoraproject fedora 31 Yes
References