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CVE

CVE-2020-8616

A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when p

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.

HIGH · CVSS 8.6 EPSS 0.1534
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  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0

Weakness Classification

Affected Products & Versions

9
isc bind>= 9.0.0 and <= 9.11.18
isc bind>= 9.12.0 and <= 9.12.4
isc bind>= 9.13.0 and <= 9.13.7
isc bind>= 9.14.0 and <= 9.14.11
isc bind>= 9.15.0 and <= 9.15.6
isc bind>= 9.16.0 and <= 9.16.2
isc bind>= 9.17.0 and <= 9.17.1
isc bindall versions

Public Exploits & PoCs

1
pocwww.nxnsattack.comwww.nxnsattack.com

Scoring & Timeline

8.6
HIGH · CVSS v3.1 · security-officer@isc.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 May 2020 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Vendor Advisories

21
suse-csafopenSUSE-SU-2024:10650-1
suse-csafopenSUSE-SU-2020:1701-1
suse-csafopenSUSE-SU-2020:1699-1
suse-csafSUSE-SU-2020:2914-1
suse-csafSUSE-SU-2020:1914-1
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