What is the CVSS score of CVE-2017-11104?

CVE-2017-11104 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 2.0%.

Is there a public PoC exploit available for CVE-2017-11104?

Yes, a public proof-of-concept exploit is available for CVE-2017-11104. Prioritise patching immediately. EPSS: 2.0%.

Is there a patch available for CVE-2017-11104?

Yes, a patch is available for CVE-2017-11104. Update the affected software to the latest version immediately.

Knot Dns CVE-2017-11104

MEDIUM

Improper Input Validation (CWE-20)

2017-07-08 cve@mitre.org

Authentication Bypass Knot Dns Debian Linux

5.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.9 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

None

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Jul 08, 2017 - 10:29 cve.org

MEDIUM 5.9

DescriptionCVE.org

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.

AnalysisAI

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. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-20. 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. Affected products include: Knot-Dns Knot Dns, Debian Debian Linux. Version information: before 2.4.5.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.