Discourse up to 3.1.0.beta6 Setting nonce re-use

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Discourse up to 3.1.0.beta6. Affected by this issue is some unknown functionality of the component Setting Handler. This manipulation causes nonce re-use. This vulnerability is tracked as CVE-2023-37467. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Discourse up to 3.1.0.beta6 and classified as problematic. Affected by this vulnerability is an unknown code of the component Setting Handler. The manipulation with an unknown input leads to a nonce re-use vulnerability. The CWE definition for the vulnerability is CWE-323. Nonces should be used for the present occasion and only once. As an impact it is known to affect integrity. The summary by CVE is:

Discourse is an open source discussion platform. Prior to version 3.1.0.beta7 of the `beta` and `tests-passed` branches, a CSP (Content Security Policy) nonce reuse vulnerability was discovered could allow cross-site scripting (XSS) attacks to bypass CSP protection for anonymous (i.e. unauthenticated) users. There are no known XSS vectors at the moment, but should one be discovered, this vulnerability would allow the XSS attack to bypass CSP and execute successfully. This vulnerability isn't applicable to logged-in users. Version 3.1.0.beta7 contains a patch. The stable branch doesn't have this vulnerability. A workaround to prevent the vulnerability is to disable Google Tag Manager, i.e., unset the `gtm container id` setting.

The weakness was disclosed 07/28/2023 as GHSA-gr5h-hm62-jr3j. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-37467 since 07/06/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

Upgrading to version 3.1.0.beta7 eliminates this vulnerability. Applying the patch 0976c8fad6970b6182e7837bf87de07709407f25 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

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 6.8
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: Nonce re-use
CWE: CWE-323
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 3.1.0.beta7
Patch: 0976c8fad6970b6182e7837bf87de07709407f25

Timelineinfo

07/06/2023 🔍
07/28/2023 +22 days 🔍
07/28/2023 +0 days 🔍
08/23/2023 +26 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-gr5h-hm62-jr3j
Status: Confirmed

CVE: CVE-2023-37467 (🔍)
GCVE (CVE): GCVE-0-2023-37467
GCVE (VulDB): GCVE-100-235687

Entryinfo

Created: 07/28/2023 17:46
Updated: 08/23/2023 08:22
Changes: 07/28/2023 17:46 (51), 08/23/2023 08:22 (11)
Complete: 🔍
Cache ID: 216::103

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