Resource Exhaustion Affecting bind-libs package, versions <32:9.11.20-5.el8


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.41% (75th percentile)

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  • Snyk IDSNYK-RHEL8-BINDLIBS-3858520
  • published26 Jul 2021
  • disclosed20 Aug 2020

Introduced: 20 Aug 2020

CVE-2020-8622  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade RHEL:8 bind-libs to version 32:9.11.20-5.el8 or higher.
This issue was patched in RHSA-2020:4500.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind-libs package and not the bind-libs package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.

CVSS Scores

version 3.1