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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-34253 Detail

Current Description

Grav is a flat-file content management system. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- (1) using unsafe functions that are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. A patch in version 1.7.42 improves the denylist.


View Analysis Description

Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190 Issue Tracking 
https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190 Issue Tracking 
https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b Patch 
https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b Patch 
https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm Exploit  Vendor Advisory 
https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm Exploit  Vendor Advisory 
https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/ Exploit  Third Party Advisory 
https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/ Exploit  Third Party Advisory 
https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83 Patch 
https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83 Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-94 Improper Control of Generation of Code ('Code Injection') cwe source acceptance level NIST  
CWE-184 Incomplete List of Disallowed Inputs GitHub, Inc.  
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-34253
NVD Published Date:
06/14/2023
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.