Nagios XI up to 5.9.2 is_insecure_login_authenticated timing discrepancy

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k1.03+

Summaryinfo

A vulnerability classified as problematic was found in Nagios XI up to 5.9.2. Affected by this issue is the function is_insecure_login_authenticated. Such manipulation leads to timing discrepancy. This vulnerability is uniquely identified as CVE-2023-24035. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Nagios XI up to 5.9.2. Affected by this issue is the function is_insecure_login_authenticated. The manipulation with an unknown input leads to a timing discrepancy vulnerability. Using CWE to declare the problem leads to CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at nagios.com. This vulnerability is handled as CVE-2023-24035 since 01/21/2023. The exploitation is known to be difficult. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 5.9.3 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.5
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Timing discrepancy
CWE: CWE-208 / CWE-203 / CWE-200
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: XI 5.9.3

Timelineinfo

01/21/2023 CVE reserved
09/14/2026 +1331 days Advisory disclosed
09/14/2026 +0 days VulDB entry created
09/14/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: nagios.com
Status: Confirmed

CVE: CVE-2023-24035 (🔒)
GCVE (CVE): GCVE-0-2023-24035
GCVE (VulDB): GCVE-100-403382

Entryinfo

Created: 09/14/2026 05:58
Changes: 09/14/2026 05:58 (64)
Complete: 🔍
Cache ID: 216::103

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