CVE-2016-6171
HIGH
8.6
CVSS Score
Published: February 9, 2017 at 03:00 PM UTC
Updated: June 17, 2026 at 12:50 AM UTC
1 product affected across 1 vendorKnot DNS
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Severity
HIGH8.6
Exploit prediction
EPSS 3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.3.0
Affected range stops below 2.3.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (7)
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2016/07/06/3Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2016/07/06/4VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/91678x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/sischkg/xfer-limit/blob/master/README.mdx_refsource_CONFIRMRelease NotesVDB Entry
Source: [email protected]
https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWSx_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://gitlab.labs.nic.cz/labs/knot/issues/464Mailing Listx_refsource_MLISTTechnical Description
Source: [email protected]
https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-400
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