License-service disruption via self-declared FlexNet privilege
Published Jun 16, 2022 · Updated Sep 16, 2024
Denial of service in Citrix NetScaler Console, formerly ADM, before 13.0-85.19 or 13.1-21.53 allows remote attackers to stop licensing. The FlexNet lmgrd service on TCP port 27000 trusts client-supplied identity and privilege fields, allowing an unauthenticated lmdown request to stop the server. Network access to the appliance IP is required; the shutdown prevents new licenses from being issued or renewed until the service returns.
Summary
What happened
Denial of service in Citrix NetScaler Console, formerly ADM, before 13.0-85.19 or 13.1-21.53 allows remote attackers to stop licensing. The FlexNet lmgrd service on TCP port 27000 trusts client-supplied identity and privilege fields, allowing an unauthenticated lmdown request to stop the server. Network access to the appliance IP is required; the shutdown prevents new licenses from being issued or renewed until the service returns.
The record
- CVE
- CVE-2022-27512
- Published
- Jun 16, 2022
- Updated
- Sep 16, 2024
- Vendor
- Citrix
- Product
- NetScaler Console
- Classifications
- CWE-416, CWE-664, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 16, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 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.
- Affected versionversion=unspecified <13.0-85.19
- Affected versionversion=unspecified <13.1-21.53
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- doltool FlexLM authentication-bypass proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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