Security restrictions bypass in Symfony Twig

1) Security features bypass

EUVDB-ID: #VU61609

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-23614

CWE-ID: CWE-254 - Security Features

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to missing security restrictions for non closures in "sort" filter when using a sandbox mode. A remote attacker can pass specially crafted data to the application and execute arbitrary PHP code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Twig: 2.0.0 - 3.3.7

External links

http://github.com/twigphp/Twig/commit/2eb33080558611201b55079d07ac88f207b466d5
http://github.com/twigphp/Twig/commit/22b9dc3c03ee66d7e21d9ed2ca76052b134cb9e9
http://github.com/twigphp/Twig/security/advisories/GHSA-5mv2-rx3q-4w2v
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OTN4273U4RHVIXED64T7DSMJ3VYTPRE7/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I2PVV5DUTRUECTIHMTWRI5Z7DVNYQ2YO/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PECHIY2XLWUH2WLCNPDGNFMPHPRPCEDZ/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SIGZCFSYLPP7UVJ4E4NLHSOQSKYNXSAD/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.