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CVE-2022-0217

Date: August 26, 2022

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).

Language: LUA

Severity Score

Related Resources (9)

https://github.com/bjc/prosody/commit/23a43df6fb5d3928c66f90d5c4475bca15694673
https://nvd.nist.gov/vuln/detail/CVE-2022-0217
https://security-tracker.debian.org/tracker/CVE-2022-0217
https://prosody.im/security/advisory_20220113/
https://security.alpinelinux.org/vuln/CVE-2022-0217
https://bugzilla.redhat.com/show_bug.cgi?id=2040639
https://prosody.im/security/advisory_20220113/1.patch
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-0217
https://www.mend.io/vulnerability-database/CVE-2022-0217

Severity Score

Weakness Type (CWE)

Improper Restriction of XML External Entity Reference

CWE-611

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

CWE-776

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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