CVE-2020-8616
BIND does not sufficiently limit the number of fetches performed when processing referrals
- State
- Published
- Severity
- 8.6 High
- Published
- May 19, 2020
- Updated
- Sep 16, 2024
- Reserved
- Feb 5, 2020
Description
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | isc |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
BIND9ISC |
|
References
- https://kb.isc.org/docs/cve-2020-8616
- http://www.nxnsattack.com/
- [oss-security] 20200519 Two vulnerabilities disclosed in BIND (CVE-2020-8616 and CVE-2020-8617)mailing-list
- DSA-4689vendor-advisory
- https://security.netapp.com/advisory/ntap-20200522-0002/
- USN-4365-2vendor-advisory
- https://www.synology.com/security/advisory/Synology_SA_20_12
- USN-4365-1vendor-advisory
- [debian-lts-announce] 20200530 [SECURITY] [DLA 2227-1] bind9 security updatemailing-list
- FEDORA-2020-2d89cbcfd9vendor-advisory
- FEDORA-2020-f9dcd4e9d5vendor-advisory
- openSUSE-SU-2020:1699vendor-advisory
- openSUSE-SU-2020:1701vendor-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.