CVE-2019-6477

Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 26 Nov 2019, 16:11
Last modified:16 Sept 2024, 16:47

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
5.68% LOW
6% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Nov 2019, 16:11
Published
Vulnerability first disclosed
16 Sept 2024, 16:47
Last Modified
Vulnerability information updated

Description

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).

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 5.68%• Percentile: 91%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

Affected Systems

  • fedoraproject•fedora

    30 | 31

  • isc•bind

    ≥ 9.11.7, ≤ 9.11.12 | ≥ 9.14.1, ≤ 9.14.7 | ≥ 9.15.0, ≤ 9.15.5 | 9.11.5:s6 | 9.11.6:p1 | 9.11.6:rc1 | 9.11.12:s1 | 9.12.4:p1 | 9.12.4:p2

  • isc•bind9

    9.11.6-P1 -> 9.11.12, 9.12.4-P1 -> 9.12.4-P2, 9.14.1 -> 9.14.7, and versions 9.11.5-S6 -> 9.11.12-S1 of BIND 9 Supported Preview Edition. Versions 9.15.0 -> 9.15.5 of the BIND 9.15 development branch are also affected

References (8)