PT-2021-14372 · Octobercms+2 · October Cms+1
CVSS v3.1
5.2
Medium
| Vector | AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L |
Impact
A bypass of CVE-2020-26231 (fixed in 1.0.470/471 and 1.1.1) was discovered that has the same impact as CVE-2020-26231 & 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.Patches
Issue has been patched in Build 472 (v1.0.472) and v1.1.2.
Workarounds
Apply https://github.com/octobercms/october/commit/f63519ff1e8d375df30deba63156a2fc97aa9ee7 to your installation manually if unable to upgrade to Build 472 or v1.1.2.
References
Reported by ka1n4t
For more information
If you have any questions or comments about this advisory:
- Email us at hello@octobercms.com
Threat assessment:
Fix
Missing Authorization
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Weakness Enumeration
Related Identifiers
Affected Products
October Cms
October