VulnerabilityModified
CVE-2017-11104
Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an…
MEDIUM 5.9EPSS 2.68%
Does this matter?
Lower severity and a low EPSS score (2.68%). Track it; it rarely justifies an emergency change on its own.
Description
Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an improper TSIG validity period check.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.68% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- knot-dns/knot dns · debian/debian linux
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.htmlBroken Link
- http://www.debian.org/security/2017/dsa-3910Third Party Advisory
- http://www.securityfocus.com/bid/99598Broken Link
- http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdfExploit, Mitigation, Patch, Third Party Advisory
- https://bugs.debian.org/865678Issue Tracking, Third Party Advisory
- https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.htmlBroken Link, Mailing List, Patch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.htmlBroken Link
- http://www.debian.org/security/2017/dsa-3910Third Party Advisory
- http://www.securityfocus.com/bid/99598Broken Link
- http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdfExploit, Mitigation, Patch, Third Party Advisory
- https://bugs.debian.org/865678Issue Tracking, Third Party Advisory
- https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.htmlBroken Link, Mailing List, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.