Vulnerability in Isc Bind
CVE-2020-8623
In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker
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: 0.064 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: 0.000
Affected products
- Isc Bind — versions 9.10.5, 9.11.21
- Isc Bind9 — versions 9.10.0, unspecified, 9.12.0
- NetApp Steelstore Cloud Integrated Storage
- Synology DNS Server
- Canonical Ubuntu Linux — versions 16.04, 18.04, 20.04
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 31, 32
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- kb.isc.org/docs/cve-2020-8623 (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20200827-0003/ (Third Party Advisory)
- usn.ubuntu.com/4468-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2020/dsa-4752 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2020/08/msg00053.html (mailing-list, Mailing List, 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)
Frequently asked questions
- What is CVE-2020-8623?
- CVE-2020-8623 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-2020-8623?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-8623 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.