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

Resource Exhaustion Affecting bind9 package, versions <1:9.16.3-1

Threat Intelligence

1.64% (88^th percentile)

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Snyk ID SNYK-DEBIANUNSTABLE-BIND9-569632
published 19 May 2020
disclosed 19 May 2020

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Introduced: 19 May 2020

CVE-2020-8616 Open this link in a new tab CWE-400 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.

A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Network
Attack Complexity (AC)

Low
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Changed

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

High

Resource Exhaustion Affecting bind9 package, versions <1:9.16.3-1

Severity

Snyk's Security Team recommends NVD's CVSS assessment