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CVE-2017-11104

19
FAUCET Score

CVE-2017-11104 is a medium-severity vulnerability affecting Knot DNS versions before 2.4.5 and 2.5.2. It allows an attacker with a valid TSIG key name and algorithm to bypass authentication due to an improper validity period check, if no additional ACL restrictions are in place. The attack complexity is high, but successful exploitation could lead to high integrity impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.4CPE matchmatch criteria
cpe:2.3:a:knot-dns:knot_dns:*:*:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:a:knot-dns:knot_dns:2.5.0:*:*:*:*:*:*:*
2.5.1CPE matchmatch criteria
cpe:2.3:a:knot-dns:knot_dns:2.5.1:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.68%
Probability of exploitation in next 30 days
EPSS Percentile
84.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0268 is in the 76th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.opensuse.org / opensuse-security-announce/2020-07/msg00076.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2020-07/msg00078.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2020-07/msg00089.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2020-09/msg00049.html
Broken Link
bugs.debian.org / 865678
Issue TrackingThird Party Advisory
lists.nic.cz / pipermail/knot-dns-users/2017-June/001144.html
Broken LinkMailing ListPatchThird Party Advisory
debian.org / security/2017/dsa-3910
Third Party Advisory
securityfocus.com / bid/99598
Broken Link
synacktiv.ninja / ressources/Knot_DNS_TSIG_Signature_Forgery.pdf
ExploitMitigationPatchThird Party Advisory