CVE-2016-6171
high
CVSS v3
8.6
CVSS v4 NEW
—
VIR risk
8.6
Description
Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.
Predictions
Exploit likelihood
91%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2.3.0-1 |
| sid | Fixed | 2.3.0-1 |
| forky | Fixed | 2.3.0-1 |
| bullseye | Fixed | 2.3.0-1 |
| bookworm | Fixed | 2.3.0-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| knot-dns | knot_dns | {"endExcluding":"2.3.0"} | 2.3.0 |
References
- http://www.openwall.com/lists/oss-security/2016/07/06/3
- http://www.openwall.com/lists/oss-security/2016/07/06/4
- http://www.securityfocus.com/bid/91678
- https://github.com/sischkg/xfer-limit/blob/master/README.md
- https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS
- https://gitlab.labs.nic.cz/labs/knot/issues/464
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html
- https://www.suse.com/security/cve/CVE-2016-6171.html
- https://security-tracker.debian.org/tracker/CVE-2016-6171
CWEs
CWE-400
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.