CVE-2020-8617

 

Published at: - 19-05-2020 04:15

Last modified: - 09-09-2022 07:47

Total changes: - 2

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://kb.isc.org/docs/cve-2020-8617
• [oss-security] 20200519 Two vulnerabilities disclosed in BIND (CVE-2020-8616 and CVE-2020-8617)-Mailing List, Patch, Third Party Advisory
• DSA-4689-Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200522-0002/
• http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html
• USN-4365-2-Third Party Advisory
• USN-4365-1-Third Party Advisory
• [debian-lts-announce] 20200530 [SECURITY] [DLA 2227-1] bind9 security update-Mailing List, Third Party Advisory
• FEDORA-2020-2d89cbcfd9-Mailing List, Third Party Advisory
• FEDORA-2020-f9dcd4e9d5-Mailing List, Third Party Advisory
• openSUSE-SU-2020:1699-Mailing List, Third Party Advisory
• openSUSE-SU-2020:1701-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2020-8617

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures