CVE-2023-23621

Summary

Discourse is an open-source discussion platform. Prior to version 3.0.1 on the stable branch and version 3.1.0.beta2 on the beta and tests-passed branches, a malicious user can cause a regular expression denial of service using a carefully crafted user agent. This issue is patched in version 3.0.1 on the stable branch and version 3.1.0.beta2 on the beta and tests-passed branches. There are no known workarounds.

Affected Software

Weaknesses

• CWE-1333: CWE-1333: Inefficient Regular Expression Complexity

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/discourse/discourse/security/advisories/GHSA-mrfp-54hf-jrcv
• https://github.com/discourse/discourse/pull/20002
• https://github.com/discourse/discourse/commit/6d92c3cbdac431db99a450f360a3048bb3aaf458

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/discourse/discourse/security/advisories/GHSA-mrfp-54hf-jrcv
• https://github.com/discourse/discourse/pull/20002
• https://github.com/discourse/discourse/commit/6d92c3cbdac431db99a450f360a3048bb3aaf458

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