Vulnerability in Isc Bind
CVE-2020-8621
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.030 (87.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Isc Bind
- Isc Bind9 — versions 9.14.0
- NetApp Steelstore Cloud Integrated Storage
- Synology DNS Server
- Canonical Ubuntu Linux — versions 16.04, 18.04, 20.04
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
References
- kb.isc.org/docs/cve-2020-8621 (Vendor Advisory)
- security.netapp.com/advisory/ntap-20200827-0003/ (Third Party Advisory)
- usn.ubuntu.com/4468-1/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202008-19 (vendor-advisory, Third Party Advisory)
- www.synology.com/security/advisory/Synology_SA_20_19 (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html (vendor-advisory, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8621?
- CVE-2020-8621 is a high-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2020-08-21.
- How severe is CVE-2020-8621?
- High severity. CVSS v3 base score is 7.5 out of 10.