Prosody libexpat xml entity expansion

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability classified as problematic has been found in Prosody (the affected version unknown). This affects some unknown functionality of the component libexpat. The manipulation with an unknown input leads to a xml entity expansion vulnerability. CWE is classifying the issue as CWE-776. The software uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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).

The weakness was published 08/27/2022. The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2022-0217 since 01/13/2022. Neither technical details nor an exploit are publicly available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at prosody.im.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Xml entity expansion
CWE: CWE-776
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: prosody.im

Timelineinfo

01/13/2022 CVE reserved
08/27/2022 +225 days Advisory disclosed
08/27/2022 +0 days VulDB entry created
10/02/2022 +36 days VulDB last update

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2022-0217 (🔒)

Entryinfo

Created: 08/27/2022 08:03 AM
Updated: 10/02/2022 02:14 PM
Changes: 08/27/2022 08:03 AM (39), 10/02/2022 02:14 PM (11)
Complete: 🔍

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