AccessKeys AccessPress Anonymous Post Pro Plugin up to 3.1.9 on WordPress file-uploader.php unrestricted upload

Summaryinfo

A vulnerability, which was classified as critical, has been found in AccessKeys AccessPress Anonymous Post Pro Plugin up to 3.1.9 on WordPress. Impacted is an unknown function of the file inc/cores/file-uploader.php. This manipulation causes unrestricted upload. This vulnerability is tracked as CVE-2017-16949. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in AccessKeys AccessPress Anonymous Post Pro Plugin up to 3.1.9 on WordPress (WordPress Plugin). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file inc/cores/file-uploader.php. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in the AccessKeys AccessPress Anonymous Post Pro plugin through 3.1.9 for WordPress. Improper input sanitization allows the attacker to override the settings for allowed file extensions and upload file size, related to inc/cores/file-uploader.php and file-uploader/file-uploader-class.php. This allows the attacker to upload anything they want to the server, as demonstrated by an action=ap_file_upload_action&allowedExtensions[]=php request to /wp-admin/admin-ajax.php that results in a .php file upload and resultant PHP code execution.

The bug was discovered 12/13/2017. The weakness was disclosed 12/19/2017 as File 145398/Acc (Packetstorm). The advisory is shared at packetstormsecurity.com. This vulnerability is known as CVE-2017-16949 since 11/26/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:inc/cores/file-uploader.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.

The vulnerability is also documented in the vulnerability database at Exploit-DB (43324). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Name

• AccessKeys AccessPress Anonymous Post Pro Plugin

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.1.5
• 3.1.6
• 3.1.7
• 3.1.8
• 3.1.9

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion