Discourse up to 3.3.6 Messaging Bus path traversal

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Discourse up to 3.3.6. The impacted element is an unknown function of the component Messaging Bus. This manipulation causes path traversal. This vulnerability is handled as CVE-2021-43840. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Discourse up to 3.3.6. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component Messaging Bus. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality.

The weakness was released 12/17/2021 as GHSA-xmgj-5fh3-xjmm. The advisory is shared at github.com. This vulnerability is known as CVE-2021-43840 since 11/16/2021. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 3.3.7 eliminates this vulnerability. Applying the patch 9b6deee01ed474c7e9b5ff65a06bb0447b4db2ba is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 2.2
VulDB Temp Score: 2.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.4
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Discourse 3.3.7
Patch: 9b6deee01ed474c7e9b5ff65a06bb0447b4db2ba

Timelineinfo

11/16/2021 🔍
12/17/2021 +31 days 🔍
12/17/2021 +0 days 🔍
12/24/2021 +7 days 🔍

Sourcesinfo

Advisory: GHSA-xmgj-5fh3-xjmm
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-43840 (🔍)
GCVE (CVE): GCVE-0-2021-43840
GCVE (VulDB): GCVE-100-188701

Entryinfo

Created: 12/17/2021 22:46
Updated: 12/24/2021 13:37
Changes: 12/17/2021 22:46 (51), 12/24/2021 13:37 (2)
Complete: 🔍
Cache ID: 216::103

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