CVE-2022-0217
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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).
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.41% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-776, CWE-611
- Affected
- prosody/prosody
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2040639Issue Tracking, Third Party Advisory
- https://prosody.im/security/advisory_20220113/Exploit, Patch, Vendor Advisory
- https://prosody.im/security/advisory_20220113/1.patchPatch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2040639Issue Tracking, Third Party Advisory
- https://prosody.im/security/advisory_20220113/Exploit, Patch, Vendor Advisory
- https://prosody.im/security/advisory_20220113/1.patchPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.