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| Rule General Information |
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| Release Date: | 2020-06-02 | |
| Rule Name: | ISC BIND TSIG Denial of Service Vulnerability -2 (CVE-2020-8617) | |
| Severity: | ||
| CVE ID: | ||
| Rule Protection Details |
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| 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. | |
| Impact: | An attacker can launch a denial of service attack by exploiting the vulnerability successfully. | |
| Affected OS: | Windows, Linux | |
| Reference: | http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html http://www.openwall.com/lists/oss-security/2020/05/19/4 https://kb.isc.org/docs/cve-2020-8617 https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html |
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| Solutions |
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| The vendors have released upgrade patches to fix vulnerabilities, please visit: https://kb.isc.org/docs/cve-2020-8617 |