CVE-2020-8622
Last modified
CVE-2020-8622 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 5.54% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Isc | Bind | >= 9.0.0, <= 9.11.21 | — |
| Isc | Bind | >= 9.12.0, <= 9.16.5 | — |
| Isc | Bind | >= 9.17.0, <= 9.17.3 | — |
| Isc | Bind | 9.9.3 | S1 |
| Isc | Bind | 9.11.21 | S1 |
| Fedoraproject | Fedora | 31 | — |
| Fedoraproject | Fedora | 32 | — |
| Debian | Debian Linux | 9.0 | — |
| Debian | Debian Linux | 10.0 | — |
| Canonical | Ubuntu Linux | 12.04 | — |
| Canonical | Ubuntu Linux | 14.04 | — |
| Canonical | Ubuntu Linux | 16.04 | — |
| Canonical | Ubuntu Linux | 18.04 | — |
| Canonical | Ubuntu Linux | 20.04 | — |
| Netapp | Steelstore Cloud Integrated Storage | All versions | — |
| Opensuse | Leap | 15.1 | — |
| Opensuse | Leap | 15.2 | — |
| Synology | Dns Server | < 2.2.2-5028 | — |
| Oracle | Communications Diameter Signaling Router | >= 8.0.0, <= 8.5.0 | — |
References
- https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlMailing List, Third Party Advisory
- https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlMailing List, Third Party Advisory
- https://kb.isc.org/docs/cve-2020-8622Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00053.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202008-19Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200827-0003/Third Party Advisory
- https://usn.ubuntu.com/4468-1/Third Party Advisory
- https://usn.ubuntu.com/4468-2/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4752Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://www.synology.com/security/advisory/Synology_SA_20_19Third Party Advisory
- https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlMailing List, Third Party Advisory
- https://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlMailing List, Third Party Advisory
- https://kb.isc.org/docs/cve-2020-8622Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00053.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202008-19Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200827-0003/Third Party Advisory
- https://usn.ubuntu.com/4468-1/Third Party Advisory
- https://usn.ubuntu.com/4468-2/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4752Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://www.synology.com/security/advisory/Synology_SA_20_19Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Related CVEs from 2020
- CVE-2020-8616A malicious actor who intentionally exploits this lack of ef…8.6
- CVE-2020-8617Using a specially-crafted message, an attacker may potential…5.9
- CVE-2020-8618An attacker who is permitted to send zone data to a server v…4.9
- CVE-2020-8619In ISC BIND9 versions BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -…4.9
- CVE-2020-8620In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who …7.5
- CVE-2020-8621In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is c…7.5
- CVE-2020-8623In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.…7.5
- CVE-2020-8624In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 -> 9.11.2…4.3
- CVE-2020-8625BIND servers are vulnerable if they are running an affected …8.1
- CVE-2020-8626Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. Reason: T…
- CVE-2020-8627Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. Reason: T…
- CVE-2020-8628Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. Reason: T…
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