CVE-2020-8621

moderate-risk
Published 2020-08-21

In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.

Do I need to act?

~
4.9% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (8)

Dns Server

Affected Vendors

Isc Canonical Netapp Opensuse Synology

References (14)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
Vendor Advisory https://kb.isc.org/docs/cve-2020-8621
Third Party Advisory https://security.gentoo.org/glsa/202008-19
Third Party Advisory https://security.netapp.com/advisory/ntap-20200827-0003/
Third Party Advisory https://usn.ubuntu.com/4468-1/
Third Party Advisory https://www.synology.com/security/advisory/Synology_SA_20_19
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
Vendor Advisory https://kb.isc.org/docs/cve-2020-8621
Third Party Advisory https://security.gentoo.org/glsa/202008-19
Third Party Advisory https://security.netapp.com/advisory/ntap-20200827-0003/
Third Party Advisory https://usn.ubuntu.com/4468-1/
Third Party Advisory https://www.synology.com/security/advisory/Synology_SA_20_19
48
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 8/34 · Low
Exposure 14/34 · Moderate