Executive Summary

Informations
Name CVE-2020-8617 First vendor Publication 2020-05-19
Vendor Cve Last vendor Modification 2023-11-07

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 5.9
Base Score 5.9 Environmental Score 5.9
impact SubScore 3.6 Temporal Score 5.9
Exploitabality Sub Score 2.2
 
Attack Vector Network Attack Complexity High
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:M/Au:N/C:N/I:N/A:P)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

TypeDescriptionCount
Application 665
Os 6
Os 3
Os 2
Os 2

Snort® IPS/IDS

Date Description
2020-09-02 BIND DNS server TSIG denial of service attempt
RuleID : 54630 - Revision : 1 - Type : PROTOCOL-DNS

Metasploit Database

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

Sources (Detail)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
Source Url
CONFIRM https://kb.isc.org/docs/cve-2020-8617
https://security.netapp.com/advisory/ntap-20200522-0002/
DEBIAN https://www.debian.org/security/2020/dsa-4689
MISC http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html
MLIST http://www.openwall.com/lists/oss-security/2020/05/19/4
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
SUSE http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
UBUNTU https://usn.ubuntu.com/4365-1/
https://usn.ubuntu.com/4365-2/

Alert History

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Date Informations
2024-02-02 02:19:42
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2024-02-01 12:21:57
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2023-12-01 02:09:30
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2023-11-07 21:37:22
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2023-09-23 02:06:41
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2023-09-05 13:14:01
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2023-09-05 01:21:32
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2023-09-02 13:12:48
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2023-09-02 01:21:50
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2023-08-22 13:05:08
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2023-03-28 12:21:16
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2022-10-11 01:20:49
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2022-09-09 21:27:36
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2021-11-04 01:43:42
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2021-08-28 01:41:27
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2021-05-08 12:37:35
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2021-05-04 14:06:14
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2021-04-22 03:11:10
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2021-03-27 01:36:18
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2020-12-10 12:31:03
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2020-12-10 01:31:20
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2020-10-21 01:30:16
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2020-10-21 01:29:47
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2020-10-20 17:23:00
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2020-10-20 09:23:00
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2020-09-03 01:31:14
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2020-09-02 21:23:05
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2020-06-04 12:25:53
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2020-06-01 12:27:12
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2020-05-31 05:22:46
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2020-05-29 09:22:50
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2020-05-28 05:22:54
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2020-05-28 00:22:53
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2020-05-26 21:22:50
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2020-05-23 02:41:46
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2020-05-23 02:40:53
  • First insertion