CVE-2020-26231

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Summary

CVECVE-2020-26231
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-11-23 21:15:00 UTC
Updated2020-12-08 18:57:00 UTC
DescriptionOctober is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. A bypass of CVE-2020-15247 (fixed in 1.0.469 and 1.1.0) was discovered that has the same impact as CVE-2020-15247. An authenticated backend user with the cms.manage_pages, cms.manage_layouts, or cms.manage_partials permissions who would normally not be permitted to provide PHP code to be executed by the CMS due to cms.enableSafeMode being enabled is able to write specific Twig code to escape the Twig sandbox and execute arbitrary PHP. This is not a problem for anyone that trusts their users with those permissions to normally write & manage PHP within the CMS by not having cms.enableSafeMode enabled, but would be a problem for anyone relying on cms.enableSafeMode to ensure that users with those permissions in production do not have access to write & execute arbitrary PHP. Issue has been patched in Build 470 (v1.0.470) and v1.1.1.

Risk And Classification

Problem Types: CWE-862

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Octobercms October 1.0.469 All All All
Application Octobercms October 1.1.0 All All All
Application Octobercms October 1.0.469 All All All
Application Octobercms October 1.1.0 All All All

References

ReferenceSourceLinkTags
Improve Twig security policy · octobercms/october@d34fb8a · GitHub MISC github.com Patch, Third Party Advisory
Bypass of fix for CVE-2020-15247, Twig sandbox escape · Advisory · octobercms/october · GitHub CONFIRM github.com Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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