<p>Upgrade <code>Debian:unstable</code> <code>bind9</code> to version 1:9.16.3-1 or higher.</p>

Reachable Assertion Affecting bind9 package, versions <1:9.16.3-1

Threat Intelligence

97.22% (100^th percentile)

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Snyk ID SNYK-DEBIANUNSTABLE-BIND9-569641
published 19 May 2020
disclosed 19 May 2020

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Introduced: 19 May 2020

CVE-2020-8617 Open this link in a new tab CWE-617 Open this link in a new tab

How to fix?

Upgrade Debian:unstable bind9 to version 1:9.16.3-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind9 package and not the bind9 package as distributed by Debian. See How to fix? for Debian:unstable 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.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Network
Attack Complexity (AC)

High
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

High

Reachable Assertion Affecting bind9 package, versions <1:9.16.3-1

Severity

Snyk's Security Team recommends NVD's CVSS assessment