PRIOn knowledge basePRION:CVE-2022-39261Input validation
Twig is a template language for PHP. Versions 1.x prior to 1.44.7, 2.x prior to 2.15.3, and 3.x prior to 3.4.3 encounter an issue when the filesystem loader loads templates for which the name is a user input. It is possible to use the source or include statement to read arbitrary files from outside the templates’ directory when using a namespace like @somewhere/../some.file. In such a case, validation is bypassed. Versions 1.44.7, 2.15.3, and 3.4.3 contain a fix for validation of such template names. There are no known workarounds aside from upgrading.
References
github.com/twigphp/Twig/commit/35f3035c5deb0041da7b84daf02dea074ddc7a0b
github.com/twigphp/Twig/security/advisories/GHSA-52m2-vc4m-jj33
lists.debian.org/debian-lts-announce/2022/10/msg00016.html
lists.fedoraproject.org/archives/list/[email protected]/message/2OKRUHPVLIQVFPPJ2UWC3WV3WQO763NR/
lists.fedoraproject.org/archives/list/[email protected]/message/AUVTXMNPSZAHS3DWZEM56V5W4NPVR6L7/
lists.fedoraproject.org/archives/list/[email protected]/message/NWRFPZSR74SYVJKBTKTMYUK36IJ3SQJP/
lists.fedoraproject.org/archives/list/[email protected]/message/TW53TFJ6WWNXMUHOFACKATJTS7NIHVQE/
lists.fedoraproject.org/archives/list/[email protected]/message/WV5TNNJLGG536TJH6DLCIAAZZIPV2GUD/
lists.fedoraproject.org/archives/list/[email protected]/message/YU4ZYX62H2NUAKKGUES4RZIM4KMTKZ7F/
www.debian.org/security/2022/dsa-5248
www.drupal.org/sa-core-2022-016
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