Reachable Assertion Affecting bind-libs package, versions <32:9.11.13-5.el8_2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
97.2% (100th percentile)

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  • Snyk IDSNYK-RHEL8-BINDLIBS-3756699
  • published26 Jul 2021
  • disclosed19 May 2020

Introduced: 19 May 2020

CVE-2020-8617  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

Upgrade RHEL:8 bind-libs to version 32:9.11.13-5.el8_2 or higher.
This issue was patched in RHSA-2020:2338.

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.

Using a specially-crafted message, an attacker may potentially cause a BIND server to reach an inconsistent state if the attacker knows (or successfully guesses) the name of a TSIG key used by the server. Since BIND, by default, configures a local session key even on servers whose configuration does not otherwise make use of it, almost all current BIND servers are vulnerable. In releases of BIND dating from March 2018 and after, an assertion check in tsig.c detects this inconsistent state and deliberately exits. Prior to the introduction of the check the server would continue operating in an inconsistent state, with potentially harmful results.

CVSS Scores

version 3.1