zzcms 8.3 user/zssave.php oldimg path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in zzcms 8.3. This affects an unknown function of the file user/zssave.php. Such manipulation of the argument oldimg as part of Modify Request leads to path traversal. This vulnerability is documented as CVE-2018-17797. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in zzcms 8.3 (Content Management System). Affected by this issue is some unknown functionality of the file user/zssave.php. The manipulation of the argument oldimg as part of a Modify Request leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. CVE summarizes:

An issue was discovered in zzcms 8.3. user/zssave.php allows remote attackers to delete arbitrary files via directory traversal sequences in the oldimg parameter in an action=modify request. This can be leveraged for database access by deleting install.lock.

The bug was discovered 09/28/2018. The weakness was released 09/30/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-17797 since 09/30/2018. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:user/zssave.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entry connected to this vulnerability is available at VDB-124617. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Content Management System

Name

• zzcms

Version

• 8.3

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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