Admin escalation via xmlhash external-entity expansion
Published May 3, 2022 · Updated Sep 16, 2024
XXE in the Open Build Service frontend before 2.10.13 allows remote authenticated users to obtain server information through crafted XML. The frontend's xmlhash gem parses attacker-controlled XML while permitting external entity references to retrieve data outside the intended document. Low-privileged access to an XML-processing operation is required, and the disclosed information can be abused to gain OBS administrator privileges.
Summary
What happened
XXE in the Open Build Service frontend before 2.10.13 allows remote authenticated users to obtain server information through crafted XML. The frontend's xmlhash gem parses attacker-controlled XML while permitting external entity references to retrieve data outside the intended document. Low-privileged access to an XML-processing operation is required, and the disclosed information can be abused to gain OBS administrator privileges.
The record
- CVE
- CVE-2022-21949
- Published
- May 3, 2022
- Updated
- Sep 16, 2024
- Vendor
- OpenSUSE
- Product
- Open Build Service
- Classifications
- CWE-611, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 3, 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?
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- Affected versionversion=Open Build Service <2.10.13
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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