National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2020-8616 Detail

Current Description

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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score matches with CNA score
CNA:  Internet Systems Consortium (ISC)
Base Score: 8.6 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.nxnsattack.com Exploit Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/05/19/4 Mailing List Patch Third Party Advisory
https://kb.isc.org/docs/cve-2020-8616 Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
https://security.netapp.com/advisory/ntap-20200522-0002/
https://usn.ubuntu.com/4365-1/
https://usn.ubuntu.com/4365-2/
https://www.debian.org/security/2020/dsa-4689 Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_12

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.0.0
Up to (including)
9.11.18
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.12.0
Up to (including)
9.12.4
 cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.13.0
Up to (including)
9.13.7
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.14.0
Up to (including)
9.14.11
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.15.0
Up to (including)
9.15.6
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.16.0
Up to (including)
9.16.2
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.17.0
Up to (including)
9.17.1

Configuration 2 ( hide )
 cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

10 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-8616
NVD Published Date:
05/19/2020
NVD Last Modified:
06/04/2020