Assertion Failure in BIND Server Leading to Unexpected Exits
CVE-2020-8620

7.5HIGH

Key Information:

Vendor

Isc
Status
Bind9
Vendor
CVE Published:
21 August 2020

Badges

👾 Exploit Exists

What is CVE-2020-8620?

The vulnerability allows an authenticated attacker to exploit a flaw in BIND versions 9.15.6 through 9.16.5 and 9.17.0 through 9.17.3. By establishing a TCP connection and sending specially crafted data, the attacker can trigger an assertion failure in the server, resulting in the process terminating unexpectedly. This could lead to service disruption and potential denial of service, emphasizing the importance of timely updates and security patches.

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Affected Version(s)

BIND9 9.15.6

References

https://kb.isc.org/docs/cve-2020-8620
x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-20200827-0003/
x_refsource_CONFIRM
https://usn.ubuntu.com/4468-1/
vendor-advisoryx_refsource_UBUNTU

EPSS Score

7% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Emanuel Almeida of Cisco Systems, Inc. for bringing this vulnerability to our attention.
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