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CVE-2020-8616

CVE information

Published

3 years ago

Last Modified

5 months ago

CVSSv2.0 Severity

Medium

CVSSv3.1 Severity

High

Impact Analysis

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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..

CVSSv2.0 Score

Severity
Medium
Base Score
5/10
Exploit Score
10/10
Access Vector
Network
Access Complexity
Low
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
Partial
Integrity Impact
None

CVSSv3.1 Score

Severity
High
Base Score
8.6/10
Exploit Score
3.9/10
Access Vector
Network
Access Complexity
Low
Privileges Required
None
Impact Score
4/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Changed
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.12.0 -
cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.13.0 -
cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.17.0 -
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.16.0 -
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.14.0 -
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.0.0 -
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
  Yes
9.15.0 -
cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*
  Yes
- -
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  Yes
- -

References