Prosody up to 0.11.8 TLS Renegotiation Request resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Prosody up to 0.11.8. It has been rated as problematic. This impacts an unknown function of the component TLS Renegotiation Request Handler. This manipulation causes resource consumption. This vulnerability appears as CVE-2021-32920. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Prosody up to 0.11.8 and classified as problematic. Affected by this vulnerability is an unknown function of the component TLS Renegotiation Request Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability.

The weakness was presented 05/14/2021. It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2021-32920. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 251149 (Linux Distros Unpatched Vulnerability : CVE-2021-32920), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.11.9 eliminates this vulnerability. The upgrade is hosted for download at blog.prosody.im.

The vulnerability is also documented in the vulnerability database at Tenable (251149). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 251149
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-32920

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Prosody 0.11.9

Timelineinfo

05/12/2021 🔍
05/14/2021 +2 days 🔍
05/14/2021 +0 days 🔍
08/18/2025 +1557 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-32920 (🔍)
GCVE (CVE): GCVE-0-2021-32920
GCVE (VulDB): GCVE-100-175063

Entryinfo

Created: 05/14/2021 07:16
Updated: 08/18/2025 14:00
Changes: 05/14/2021 07:16 (39), 05/16/2021 13:02 (5), 08/18/2025 14:00 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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