CVE-2023-34448
Prior to version 1.7.42, the patch for CVE-2022-2073, a server-side template injection vulnerability in Grav leveraging the default `filter()` function, did not block other built-in functions exposed by Twig's Core Extension that could be used to invoke…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Grav is a flat-file content management system. Prior to version 1.7.42, the patch for CVE-2022-2073, a server-side template injection vulnerability in Grav leveraging the default `filter()` function, did not block other built-in functions exposed by Twig's Core Extension that could be used to invoke arbitrary unsafe functions, thereby allowing for remote code execution. A patch in version 1.74.2 overrides the built-in Twig `map()` and `reduce()` filter functions in `system/src/Grav/Common/Twig/Extension/GravExtension.php` to validate the argument passed to the filter in `$arrow`.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.52% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-1336, CWE-94
- Affected
- getgrav/grav
- Source
- security-advisories@github.com
References
- https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8Patch, Vendor Advisory
- https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8Vendor Advisory
- https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148Vendor Advisory
- https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/Exploit, Patch, Third Party Advisory
- https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83Exploit, Mitigation, Vendor Advisory
- https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8Patch, Vendor Advisory
- https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8Vendor Advisory
- https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148Vendor Advisory
- https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/Exploit, Patch, Third Party Advisory
- https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83Exploit, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.