Unauthenticated service interruption via recursive XML entities
Published Jun 14, 2024 · Updated Feb 13, 2025
XML entity expansion in Toshiba Tec e-STUDIO MFPs allows remote attackers to interrupt printer service through unauthenticated HTTP requests. The /contentwebserver endpoint passes attacker-controlled DTD entities to the XML parser in mod_contentwebserver.so, allowing recursive expansion to consume CPU. Network access to the API is sufficient; increasingly complex entity payloads drive CPU use to 100% and stop printer operation.
Summary
What happened
XML entity expansion in Toshiba Tec e-STUDIO MFPs allows remote attackers to interrupt printer service through unauthenticated HTTP requests. The /contentwebserver endpoint passes attacker-controlled DTD entities to the XML parser in mod_contentwebserver.so, allowing recursive expansion to consume CPU. Network access to the API is sufficient; increasingly complex entity payloads drive CPU use to 100% and stop printer operation.
The record
- CVE
- CVE-2024-27141
- Published
- Jun 14, 2024
- Updated
- Feb 13, 2025
- Vendor
- Toshiba Tec Corporation
- Product
- e-STUDIO3525AC
- Classifications
- CWE-776, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 14, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=*
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
- Billion Laughs request for /contentwebserverfunctional · 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
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo