Resource exhaustion in Knot-Dns Knot DNS
CVE-2016-6171
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.028 (85.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2016/07/06/3 (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/91678 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html (mailing-list, Technical Description)
- www.openwall.com/lists/oss-security/2016/07/06/4 (mailing-list, Mailing List, Third Party Advisory)
- gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS (VDB Entry, Release Notes)
- gitlab.labs.nic.cz/labs/knot/issues/464 (Vendor Advisory)
- github.com/sischkg/xfer-limit/blob/master/README.md (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-6171?
- CVE-2016-6171 is a high-severity vulnerability in Knot-Dns Knot DNS, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2017-02-09.
- How severe is CVE-2016-6171?
- High severity. CVSS v3 base score is 8.6 out of 10.