Executive Summary

Name CVE-2020-8617 First vendor Publication 2020-05-19
Vendor Cve Last vendor Modification 2020-06-04

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8617

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-617 Reachable Assertion

CPE : Common Platform Enumeration

Application 661
Os 2

Metasploit Database

id Description
2020-05-19 BIND TSIG Badtime Query Denial of Service

Sources (Detail)

Source Url
CONFIRM https://kb.isc.org/docs/cve-2020-8617
DEBIAN https://www.debian.org/security/2020/dsa-4689
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
MISC http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html
MLIST http://www.openwall.com/lists/oss-security/2020/05/19/4
UBUNTU https://usn.ubuntu.com/4365-1/

Alert History

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Date Informations
2020-06-04 12:25:53
  • Multiple Updates
2020-06-01 12:27:12
  • Multiple Updates
2020-05-31 05:22:46
  • Multiple Updates
2020-05-29 09:22:50
  • Multiple Updates
2020-05-28 05:22:54
  • Multiple Updates
2020-05-28 00:22:53
  • Multiple Updates
2020-05-26 21:22:50
  • Multiple Updates
2020-05-23 02:41:46
  • Multiple Updates
2020-05-23 02:40:53
  • First insertion