CVE-2020-8620 - Reachable Assertion

Severity

75%

Complexity

39%

Confidentiality

60%

In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P).

Demo Examples

Reachable Assertion

CWE-617

In the excerpt below, an AssertionError (an unchecked exception) is thrown if the user hasn't entered an email address in an HTML form.


               
assert email != null;

Overview

First reported 4 years ago

2020-08-21 21:15:00

Last updated 4 years ago

2020-10-20 12:15:00

Affected Software

ISC BIND

ISC BIND 9.11.3 S1 Supported Preview Edition

9.11.3

References

https://kb.isc.org/docs/cve-2020-8620

https://kb.isc.org/docs/cve-2020-8620

Vendor Advisory

https://security.netapp.com/advisory/ntap-20200827-0003/

USN-4468-1

GLSA-202008-19

https://www.synology.com/security/advisory/Synology_SA_20_19

openSUSE-SU-2020:1699

openSUSE-SU-2020:1701

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