CVE-2020-8616
bind9 - security update
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.
How to fix CVE-2020-8616
To remediate CVE-2020-8616, upgrade the affected package to a fixed version below.
- —upgrade to 9.14.12-r0 or later
- —upgrade to 1:9.16.3-1 or later
- —upgrade to 1:9.9.5.dfsg-9+deb8u19 or later
- —upgrade to 1:9.10.3.dfsg.P4-12.3+deb9u6 or later
Is CVE-2020-8616 being exploited?
Moderate — EPSS is 15.3%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (4)
- from 0, < 9.14.12-r0
- from 0, < 1:9.16.3-1
- from 0, < 1:9.9.5.dfsg-9+deb8u19
- from 0, < 1:9.10.3.dfsg.P4-12.3+deb9u6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |