FileDownloader 1.7.3 Attachment Name FileDownloadUtils.java path traversal

Summaryinfo

A vulnerability classified as critical has been found in FileDownloader 1.7.3. Impacted is an unknown function of the file util/FileDownloadUtils.java of the component Attachment Name Handler. This manipulation with the input ../ causes path traversal. This vulnerability is handled as CVE-2018-11248. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in FileDownloader 1.7.3. Affected by this vulnerability is some unknown processing of the file util/FileDownloadUtils.java of the component Attachment Name Handler. The manipulation with the input value ../ leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity, and availability. The summary by CVE is:

util/FileDownloadUtils.java in FileDownloader 1.7.3 does not check an attachment's name. If an attacker places "../" in the file name, the file can be stored in an unintended directory because of Directory Traversal.

The bug was discovered 05/17/2018. The weakness was released 05/18/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-11248 since 05/18/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

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

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Productinfo

Name

• FileDownloader

Version

• 1.7.3

CPE 2.3info

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CPE 2.2info

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