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CVE-2022-0217 Detail

Current Description

It was discovered that an internal Prosody library to load XML based on libexpat does not properly restrict the XML features allowed in parsed XML data. Given suitable attacker input, this results in expansion of recursive entity references from DTDs (CWE-776). In addition, depending on the libexpat version used, it may also allow injections using XML External Entity References (CWE-611).


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugzilla.redhat.com/show_bug.cgi?id=2040639 Issue Tracking  Third Party Advisory 
https://prosody.im/security/advisory_20220113/ Exploit  Patch  Vendor Advisory 
https://prosody.im/security/advisory_20220113/1.patch Patch  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') cwe source acceptance level NIST   Contributor acceptance level Red Hat, Inc.  
CWE-20 Improper Input Validation Contributor acceptance level Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-0217
NVD Published Date:
08/26/2022
NVD Last Modified:
09/01/2022
Source:
Red Hat, Inc.