GNOME Web up to 3.31.4 JavaScript embed/ephy-web-view.c input validation

Summaryinfo

A vulnerability marked as critical has been reported in GNOME Web up to 3.31.4. The impacted element is an unknown function of the file embed/ephy-web-view.c of the component JavaScript Handler. Performing a manipulation results in input validation. This vulnerability is reported as CVE-2019-6251. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in GNOME Web up to 3.31.4. It has been classified as critical. This affects an unknown code of the file embed/ephy-web-view.c of the component JavaScript Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

embed/ephy-web-view.c in GNOME Web (aka Epiphany) through 3.31.4 allows address bar spoofing because a page load triggered by JavaScript leads to updating an address as if it were triggered by a safer visit type (e.g., VISIT_LINK, VISIT_TYPED, VISIT_BOOKMARK, or VISIT_HOMEPAGE). This is similar to the CVE-2018-8383 issue in Microsoft Edge.

The bug was discovered 09/11/2018. The weakness was disclosed 01/14/2019 (Website). It is possible to read the advisory at gitlab.gnome.org. This vulnerability is uniquely identified as CVE-2019-6251 since 01/13/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 125 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 197431 (Ubuntu Security Notification for Webkit2gtk Vulnerabilities (USN-3948-1)).

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

The entries VDB-131155, VDB-132263, VDB-132301 and VDB-132339 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• GNOME

Name

• Web

Version

• 3.31.0
• 3.31.1
• 3.31.2
• 3.31.3
• 3.31.4

License

• open-source

Website

• Vendor: https://www.gnome.org/

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