Vulnerability 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.
CVSS Score
8.6
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Knot-Dns | Knot Dns | < 2.3.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2016/07/06/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/07/06/4Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/91678Third Party AdvisoryVDB Entry
- https://github.com/sischkg/xfer-limit/blob/master/README.mdPatchThird Party Advisory
- https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adaeRelease NotesVDB Entry
- https://gitlab.labs.nic.cz/labs/knot/issues/464Vendor Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.htmlTechnical Description
- http://www.openwall.com/lists/oss-security/2016/07/06/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/07/06/4Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/91678Third Party AdvisoryVDB Entry
- https://github.com/sischkg/xfer-limit/blob/master/README.mdPatchThird Party Advisory
- https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adaeRelease NotesVDB Entry
- https://gitlab.labs.nic.cz/labs/knot/issues/464Vendor Advisory
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.htmlTechnical Description
FAQ
What is CVE-2016-6171?
CVE-2016-6171 is a vulnerability with a CVSS score of 8.6 (HIGH). 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.
How severe is CVE-2016-6171?
CVE-2016-6171 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-6171?
Check the references section above for vendor advisories and patch information. Affected products include: Knot-Dns Knot Dns.