Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2020-8617— A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c

Quick assessment

Affected
ISC BIND9
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND中存在安全漏洞。远程攻击者可利用该漏洞导致拒绝服务。以下产品及版本受到影响：BIND 9.0.0版本至9.11.18版本，9.12.0版本至9.12.4-P2版本，9.14.0版本至9.14.11版本，9.16.0版本至9.16.2版本，9.17.0版本至9.17.1版本，9.13版本，9.15版本，BIND Supported Preview Edition from 9.9.3-S1版本至9.11.18-S1版本。

CVSS 7.5 · High EPSS 93.42% · P100

Public Exploits 2

ExploitDB · 1 EDB-48521 [dos]
Metasploit · 1 bind_tsig_badtime.rb [auxiliary]

Possible ATT&CK Techniques 1 AI

T1498.001 · Direct Network Flood
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2020-8617

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND中存在安全漏洞。远程攻击者可利用该漏洞导致拒绝服务。以下产品及版本受到影响：BIND 9.0.0版本至9.11.18版本，9.12.0版本至9.12.4-P2版本，9.14.0版本至9.14.11版本，9.16.0版本至9.16.2版本，9.17.0版本至9.17.1版本，9.13版本，9.15版本，BIND Supported Preview Edition from 9.9.3-S1版本至9.11.18-S1版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.

Read summary Full analysis (login)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ISC BIND9 9.0.0 -> 9.11.18, 9.12.0 -> 9.12.4-P2, 9.14.0 -> 9.14.11, 9.16.0 -> 9.16.2, and releases 9.17.0 -> 9.17.1 of the 9.17 experimental development branch. All releases in the obsolete 9.13 and 9.15 development branches. All releases of BIND Supported Preview -

II. Public POCs for CVE-2020-8617

# POC Description Source Link Shenlong Link
1 PoC for CVE-2020-8617 (BIND) https://github.com/knqyf263/CVE-2020-8617 POC Details
2 None https://github.com/rmkn/cve-2020-8617 POC Details
3 None https://github.com/gothburz/cve-2020-8617 POC Details
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2020-8617

请登录查看更多情报信息。

Vendor Advisories for CVE-2020-8617 (3)

Exploits & Public PoCs for CVE-2020-8617 (1)

Mailing List Discussions for CVE-2020-8617 (6)

Other References for CVE-2020-8617 (1)

IV. Related Vulnerabilities

Same product: BIND9
Same vendor: ISC

V. Comments for CVE-2020-8617

No comments yet

Leave a comment