October CMS up to 1.0.469/1.1.0 Twig Sandbox authorization

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5.4$0-$5k0.00

A vulnerability was found in October CMS up to 1.0.469/1.1.0 (Content Management System) and classified as critical. Affected by this issue is some unknown processing of the component Twig Sandbox. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-862. Impacted is confidentiality, integrity, and availability. CVE summarizes:

October 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.

The weakness was published 11/24/2020. The advisory is available at github.com. This vulnerability is handled as CVE-2020-26231 since 10/01/2020. The exploitation is known to be easy. The attack may be launched remotely. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 1.0.470 or 1.1.1 eliminates this vulnerability. Applying a patch 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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VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-862
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: CMS 1.0.470/1.1.1
Patch: github.com

Timelineinfoedit

10/01/2020 CVE assigned
11/24/2020 +54 days Advisory disclosed
11/24/2020 +0 days VulDB entry created
12/10/2020 +16 days VulDB last update

Sourcesinfoedit

Advisory: github.com
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2020-26231 (🔒)

Entryinfoedit

Created: 11/24/2020 08:10 AM
Updated: 12/10/2020 08:02 AM
Changes: (19) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_cna vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss2_nvd_basescore vulnerability_cvss3_nvd_basescore
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