Vulnerability identifier: #VU61666

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-13982

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Smarty
Web applications / CMS

Vendor: smarty.php.net

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Smarty: 3.1 - 3.1.32

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External links
http://github.com/smarty-php/smarty/commit/f9ca3c63d1250bb56b2bda609dcc9dd81f0065f8
http://github.com/smarty-php/smarty/commit/c9dbe1d08c081912d02bd851d1d1b6388f6133d1
http://github.com/smarty-php/smarty/commit/bcedfd6b58bed4a7366336979ebaa5a240581531
http://github.com/smarty-php/smarty/commit/8d21f38dc35c4cd6b31c2f23fc9b8e5adbc56dfe
http://github.com/smarty-php/smarty/commit/2e081a51b1effddb23f87952959139ac62654d50
http://github.com/sbaresearch/advisories/tree/public/2018/SBA-ADV-20180420-01_Smarty_Path_Traversal
http://lists.debian.org/debian-lts-announce/2021/04/msg00004.html
http://lists.debian.org/debian-lts-announce/2021/04/msg00014.html
http://lists.debian.org/debian-lts-announce/2021/10/msg00015.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.