CVE-2020-8616
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.
- Affected products
- Alt Linux, Bind, Bind Server, Centos, Ibm Aix, Linuxmint, Powerdns Recursor, Red Hat
- Isc Bind
- ≤ 9.11.18, 9.12.4, 9.13.7, 9.14.11, 9.15.6, 9.16.2, 9.17.1
- Fix
- Available
- CVSS 3.1
- 8.6 HIGH
- EPSS
- 10.6% (95th percentile)
- Weakness
- CWE-400
- NVD status
- Modified
- Published
- 2020-05-19
Fix
Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.19 BIND 9.14.12 BIND 9.16.3 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.19-S1
Workaround
None
No indexed exploits for CVE-2020-8616 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2020-8616 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.