gnome-exe-thumbnailer up to 0.9.4 Thumbnail MSI File code injection

Summaryinfo

A vulnerability has been found in gnome-exe-thumbnailer up to 0.9.4 and classified as critical. Impacted is an unknown function of the component Thumbnail Handler. The manipulation as part of MSI File leads to code injection. This vulnerability is uniquely identified as CVE-2017-11421. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in gnome-exe-thumbnailer up to 0.9.4 and classified as critical. This issue affects an unknown part of the component Thumbnail Handler. The manipulation as part of a MSI File leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

gnome-exe-thumbnailer before 0.9.5 is prone to a VBScript Injection when generating thumbnails for MSI files, aka the "Bad Taste" issue. There is a local attack if the victim uses the GNOME Files file manager, and navigates to a directory containing a .msi file with VBScript code in its filename.

The bug was discovered 07/17/2017. The weakness was disclosed 07/18/2017 (Website). The advisory is shared at news.dieweltistgarnichtso.net. The identification of this vulnerability is CVE-2017-11421 since 07/18/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196907 (Ubuntu Security Update for gnome-exe-thumbnailer Vulnerability (CVE-2017-11421)).

Upgrading to version 0.9.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 99922†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• gnome-exe-thumbnailer

Version

• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4

License

• open-source

Website

• Product: https://github.com/gnome-exe-thumbnailer/gnome-exe-thumbnailer/

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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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