Resource Exhaustion Affecting bind-sdb package, versions <32:9.11.4-9.P2.amzn2.0.4


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.97% (89th percentile)

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  • Snyk IDSNYK-AMZN2-BINDSDB-1680785
  • published27 Sept 2021
  • disclosed26 Nov 2019

Introduced: 26 Nov 2019

CVE-2019-6477  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 bind-sdb to version 32:9.11.4-9.P2.amzn2.0.4 or higher.
This issue was patched in ALAS2-2020-1441.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind-sdb package and not the bind-sdb package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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 Scores

version 3.1