Vulnerability in Isc Bind9
CVE-2020-8617
Using a specially-crafted message, an attacker may potentially cause a BIND server to reach an inconsistent state if the attacker knows (or successfully guesses) the name of a TSIG key used by the server. Since BIND, by default, configures…
EPSS: 0.926 (99.8th percentile) — read the EPSS interpretation.
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.
Affected products
- Isc Bind9 — versions 9.0.0 -> 9.11.18, 9.12.0 -> 9.12.4-P2, 9.14.0 -> 9.14.11, 9.16.0 -> 9.16.2, and releases 9.17.0 -> 9.17.1 of the 9.17 experimental development branch. All releases in the obsolete 9.13 and 9.15 development branches. All releases of BIND Supported Preview Edition from 9.9.3-S1 -> 9.11.18-S1
Public proof-of-concept exploits
References
- kb.isc.org/docs/cve-2020-8617 (x_refsource_CONFIRM)
- [oss-security] 20200519 Two vulnerabilities disclosed in BIND (CVE-2020-8616 and CVE-2020-8617) (mailing-list, x_refsource_MLIST)
- DSA-4689 (vendor-advisory, x_refsource_DEBIAN)
- security.netapp.com/advisory/ntap-20200522-0002/ (x_refsource_CONFIRM)
- packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html (x_refsource_MISC)
- USN-4365-2 (vendor-advisory, x_refsource_UBUNTU)
- USN-4365-1 (vendor-advisory, x_refsource_UBUNTU)
- [debian-lts-announce] 20200530 [SECURITY] [DLA 2227-1] bind9 security update (mailing-list, x_refsource_MLIST)
- FEDORA-2020-2d89cbcfd9 (vendor-advisory, x_refsource_FEDORA)
- FEDORA-2020-f9dcd4e9d5 (vendor-advisory, x_refsource_FEDORA)
Frequently asked questions
- What is CVE-2020-8617?
- CVE-2020-8617 is a high-severity vulnerability in Isc Bind9. CVSS score: 7.5/10. Published 2020-05-19.
- How severe is CVE-2020-8617?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-8617 known to be exploited?
- 34 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.