Service interruption via recursive XML entity expansion
Published Jul 26, 2022 · Updated Aug 3, 2024
XML entity expansion in Christian Stefanescu untangle 1.2.0 and earlier allows remote attackers to interrupt a service via crafted XML. The parse function creates a standard SAX parser that expands recursively defined DTD entities without a resource bound, allowing crafted entity graphs to exhaust memory or CPU. The affected library must parse attacker-controlled XML, and the reported consequence is limited to service interruption.
Summary
What happened
XML entity expansion in Christian Stefanescu untangle 1.2.0 and earlier allows remote attackers to interrupt a service via crafted XML. The parse function creates a standard SAX parser that expands recursively defined DTD entities without a resource bound, allowing crafted entity graphs to exhaust memory or CPU. The affected library must parse attacker-controlled XML, and the reported consequence is limited to service interruption.
The record
- CVE
- CVE-2022-33977
- Published
- Jul 26, 2022
- Updated
- Aug 3, 2024
- Vendor
- Christian Stefanescu
- Product
- untangle
- Classifications
- CWE-776, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 26, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 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?
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- Affected versionversion=1.2.0 and earlier
What conditions does exploitation require?
What is affected?
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
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Technologies
Your stack
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Your stack
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