I-librarian up to 4.8 importmetadata.php simplexml_load_string form_import_textarea xml external entity reference

Summaryinfo

A vulnerability marked as critical has been reported in I-librarian up to 4.8. The affected element is the function simplexml_load_string of the file importmetadata.php. The manipulation of the argument form_import_textarea as part of Parameter leads to xml external entity reference. This vulnerability is documented as CVE-2018-1000124. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in I-librarian up to 4.8. It has been rated as critical. This issue affects the function simplexml_load_string of the file importmetadata.php. The manipulation of the argument form_import_textarea as part of a Parameter leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

I Librarian I-librarian version 4.8 and earlier contains a XML External Entity (XXE) vulnerability in line 154 of importmetadata.php(simplexml_load_string) that can result in an attacker reading the contents of a file and SSRF. This attack appear to be exploitable via posting xml in the Parameter form_import_textarea.

The bug was discovered 03/02/2018. The weakness was released 03/13/2018 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2018-1000124 since 03/13/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:importmetadata.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.

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

Productinfo

Name

• I-librarian

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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