CVE-2023-37897

Grav is a file-based Web-platform built in PHP. Grav is subject to a server side template injection (SSTI) vulnerability. The fix for another SSTI vulnerability using `|map`, `|filter` and `|reduce` twigs implemented in the commit `71bbed1` introduces bypass of the denylist due to incorrect return value from `isDangerousFunction()`, which allows to execute the payload prepending double backslash (`\\`). The `isDangerousFunction()` check in version 1.7.42 and onwards retuns `false` value instead of `true` when the `\` symbol is found in the `$name`. This vulnerability can be exploited if the attacker has access to: 1. an Administrator account, or 2. a non-administrator, user account that has Admin panel access and Create/Update page permissions. A fix for this vulnerability has been introduced in commit `b4c6210` and is included in release version `1.7.42.2`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b	Product
https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7	Patch
https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53	Exploit Mitigation Vendor Advisory
https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b	Product
https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7	Patch
https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:getgrav:grav:1.7.42:::::::*
	cpe:2.3:a:getgrav:grav:1.7.42.1:::::::*

History

No history.

Information

Published : 2023-07-18 21:15

Updated : 2024-11-21 08:12

NVD link : CVE-2023-37897

Mitre link : CVE-2023-37897

CVE.ORG link : CVE-2023-37897

JSON object : View

Products Affected

getgrav

grav

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CWE-393

Return of Wrong Status Code

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