CVE-2023-20154Network attack vector

Administrator access via mishandled LDAP search replies

Published Nov 15, 2024 · Updated Nov 15, 2024

Authentication bypass in Cisco Modeling Labs 2.3.0 through 2.5.0 allows remote attackers to gain administrator access to the web interface. The external authentication handler treats an LDAP reply containing a non-empty array of search-result reference entries as successful and assigns administrator privileges. Exploitation requires LDAP authentication, valid credentials stored on the associated LDAP server, and the specified failed-search response; access permits reading and modifying all simulations and user-created data.

CVSS severity9.1
Critical
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Cisco Modeling Labs 2.3.0 through 2.5.0 allows remote attackers to gain administrator access to the web interface. The external authentication handler treats an LDAP reply containing a non-empty array of search-result reference entries as successful and assigns administrator privileges. Exploitation requires LDAP authentication, valid credentials stored on the associated LDAP server, and the specified failed-search response; access permits reading and modifying all simulations and user-created data.

The record

CVE
CVE-2023-20154
Published
Nov 15, 2024
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco Modeling Labs
Classifications
CWE-305, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.3.0
  2. Affected versionversion=2.3.1
  3. Affected versionversion=2.4.0
  4. Affected versionversion=2.4.1
  5. Affected versionversion=2.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Modeling Labsversion=2.3.0; version=2.3.1; version=2.4.0; version=2.4.1; version=2.5.0

Published CVSS scores

9.1Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:X/RL:X/RC:X
8.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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