CVE-2017-11104

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.html

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.html

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.html

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.html

http://www.debian.org/security/2017/dsa-3910

http://www.securityfocus.com/bid/99598

http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf

https://bugs.debian.org/865678

https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html

Details

Source: MITRE

Published: 2017-07-08

Updated: 2020-09-18

Type: CWE-20

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
139014openSUSE Security Update : knot (openSUSE-2020-1086)NessusSuSE Local Security Checks
medium
139013openSUSE Security Update : knot (openSUSE-2020-1085)NessusSuSE Local Security Checks
medium
110067openSUSE Security Update : knot (openSUSE-2018-494)NessusSuSE Local Security Checks
medium
106196Knot DNS 2.4.x < 2.4.4 / 2.5.x < 2.5.2 TSIG Authentication Bypass Vulnerability (CVE-2017-11104)NessusDNS
medium
101871Fedora 26 : knot (2017-d3d38a53f9)NessusFedora Local Security Checks
medium
101555Debian DSA-3910-1 : knot - security updateNessusDebian Local Security Checks
medium