BlogEngine.NET up to 3.3.6.0 File Manager PostList.ascx.cs path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in BlogEngine.NET up to 3.3.6.0. Affected is an unknown function of the file PostList.ascx.cs of the component File Manager. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2019-6714. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in BlogEngine.NET up to 3.3.6.0. This affects an unknown functionality of the file PostList.ascx.cs of the component File Manager. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in BlogEngine.NET through 3.3.6.0. A path traversal and Local File Inclusion vulnerability in PostList.ascx.cs can cause unauthenticated users to load a PostView.ascx component from a potentially untrusted location on the local filesystem. This is especially dangerous if an authenticated user uploads a PostView.ascx file using the file manager utility, which is currently allowed. This results in remote code execution for an authenticated user.

The bug was discovered 02/12/2019. The weakness was released 03/21/2019 as EDB-ID 46353 as not defined exploit (Exploit-DB). The advisory is shared at exploit-db.com. This vulnerability is uniquely identified as CVE-2019-6714 since 01/23/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1006 for this issue.

After immediately, there has been an exploit disclosed. The exploit is shared for download 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 37 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.

The vulnerability is also documented in the vulnerability database at Exploit-DB (46353). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• BlogEngine.NET

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6.0

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

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