Nextcloud Server up to 24.0.9/25.0.3 Workflow os command injection

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Nextcloud Server up to 24.0.9/25.0.3. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Workflow Handler. The manipulation results in os command injection. This vulnerability is cataloged as CVE-2023-26482. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Nextcloud Server up to 24.0.9/25.0.3 (Cloud Software). It has been classified as critical. Affected is some unknown processing of the component Workflow Handler. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Nextcloud server is an open source home cloud implementation. In affected versions a missing scope validation allowed users to create workflows which are designed to be only available for administrators. Some workflows are designed to be RCE by invoking defined scripts, in order to generate PDFs, invoking webhooks or running scripts on the server. Due to this combination depending on the available apps the issue can result in a RCE at the end. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should disable app `workflow_scripts` and `workflow_pdf_converter` as a mitigation.

The weakness was shared 03/31/2023 as GHSA-h3c9-cmh8-7qpj. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-26482 since 02/23/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 24.0.10 or 25.0.4 eliminates this vulnerability. Applying the patch 5a06b50b10cc9278bbe68bbf897a0c4aeb0c4e60 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

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 9.0
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
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: Server 24.0.10/25.0.4
Patch: 5a06b50b10cc9278bbe68bbf897a0c4aeb0c4e60

Timelineinfo

02/23/2023 🔍
03/31/2023 +35 days 🔍
03/31/2023 +0 days 🔍
04/21/2023 +21 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-h3c9-cmh8-7qpj
Status: Confirmed

CVE: CVE-2023-26482 (🔍)
GCVE (CVE): GCVE-0-2023-26482
GCVE (VulDB): GCVE-100-224664

Entryinfo

Created: 03/31/2023 09:23
Updated: 04/21/2023 07:42
Changes: 03/31/2023 09:23 (54), 04/21/2023 07:42 (11)
Complete: 🔍
Cache ID: 216::103

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