An issue was discovered in Nagios XI before 5.9.3. The is_insecure_login_authenticated function uses a insecure timing comparison that leads to an attacker being able to bruteforce the admin password, by measuring timing differences in the comparison.

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Fixes

Solution

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History

Wed, 16 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 15 Sep 2026 17:00:00 +0000

Type Values Removed Values Added
Title Timing Side-Channel Enables Brute-Force Login to Nagios XI

Mon, 14 Sep 2026 23:30:00 +0000

Type Values Removed Values Added
Title Timing Side-Channel Enables Brute-Force Login to Nagios XI

Mon, 14 Sep 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Nagios xi
Vendors & Products Nagios xi

Mon, 14 Sep 2026 04:00:00 +0000

Type Values Removed Values Added
Description An issue was discovered in Nagios XI before 5.9.3. The is_insecure_login_authenticated function uses a insecure timing comparison that leads to an attacker being able to bruteforce the admin password, by measuring timing differences in the comparison.
First Time appeared Nagios
Nagios nagios Xi
Weaknesses CWE-208
CPEs cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
Vendors & Products Nagios
Nagios nagios Xi
References
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-16T14:30:20.590Z

Reserved: 2023-01-21T00:00:00.000Z

Link: CVE-2023-24035

cve-icon Vulnrichment

Updated: 2026-09-16T14:30:14.232Z

cve-icon NVD

Status : Received

Published: 2026-09-14T04:16:35.293

Modified: 2026-09-16T15:17:31.210

Link: CVE-2023-24035

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T16:45:06Z

Weaknesses