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CVE-2020-8617 Detail

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.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html Mailing List  Third Party Advisory 
http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html Third Party Advisory  VDB Entry 
http://www.openwall.com/lists/oss-security/2020/05/19/4 Mailing List  Patch  Third Party Advisory 
https://kb.isc.org/docs/cve-2020-8617 Patch  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
https://security.netapp.com/advisory/ntap-20200522-0002/ Third Party Advisory 
https://usn.ubuntu.com/4365-1/ Third Party Advisory 
https://usn.ubuntu.com/4365-2/ Third Party Advisory 
https://www.debian.org/security/2020/dsa-4689 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-617 Reachable Assertion cwe source acceptance level NIST  

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Change History

16 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-8617
NVD Published Date:
05/19/2020
NVD Last Modified:
11/06/2023
Source:
Internet Systems Consortium (ISC)