Vulnerability in Isc Bind
CVE-2020-8622
In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.056 (92.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.056 · newest: 0.056 · change: 0.000
Affected products
- Isc Bind — versions 9.9.3, 9.11.21
- Isc Bind9 — versions 9.0.0, unspecified, 9.12.0
- NetApp Steelstore Cloud Integrated Storage
- Oracle Communications Diameter Signaling Router
- Synology DNS Server
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- 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-2020-8622 (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- usn.ubuntu.com/4468-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4468-2/ (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)
- 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-2020-8622?
- CVE-2020-8622 is a medium-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2020-08-21.
- How severe is CVE-2020-8622?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-8622 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.