Path traversal in Smarty - CVE-2018-13982
Published: March 28, 2022
Vulnerability identifier: #VU61666
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-13982
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: smarty.php.net
Affected software:
Smarty
Smarty
Detailed vulnerability description
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in Smarty_Security::isTrustedResourceDir(). A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.
How to mitigate CVE-2018-13982
Install update from vendor's website.
Sources
- https://github.com/smarty-php/smarty/commit/f9ca3c63d1250bb56b2bda609dcc9dd81f0065f8
- https://github.com/smarty-php/smarty/commit/c9dbe1d08c081912d02bd851d1d1b6388f6133d1
- https://github.com/smarty-php/smarty/commit/bcedfd6b58bed4a7366336979ebaa5a240581531
- https://github.com/smarty-php/smarty/commit/8d21f38dc35c4cd6b31c2f23fc9b8e5adbc56dfe
- https://github.com/smarty-php/smarty/commit/2e081a51b1effddb23f87952959139ac62654d50
- https://github.com/sbaresearch/advisories/tree/public/2018/SBA-ADV-20180420-01_Smarty_Path_Traversal
- https://lists.debian.org/debian-lts-announce/2021/04/msg00004.html
- https://lists.debian.org/debian-lts-announce/2021/04/msg00014.html
- https://lists.debian.org/debian-lts-announce/2021/10/msg00015.html