Microsoft Internet Explorer 11 Mark of the Web Warning 7pk security

Summaryinfo

A vulnerability, which was classified as critical, has been found in Microsoft Internet Explorer 11. Affected by this issue is some unknown functionality of the component Mark of the Web Warning. Performing a manipulation results in 7pk security. This vulnerability is identified as CVE-2019-0995. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Internet Explorer 11 (Web Browser). This affects an unknown functionality of the component Mark of the Web Warning. The manipulation with an unknown input leads to a 7pk security vulnerability. CWE is classifying the issue as CWE-254. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A security feature bypass vulnerability exists when urlmon.dll improperly handles certain Mark of the Web queries, aka 'Internet Explorer Security Feature Bypass Vulnerability'.

The bug was discovered 05/14/2019. The weakness was released 05/14/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2019-0995 since 11/26/2018. 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. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/10/2020). It is expected to see the exploit prices for this product decreasing in the near future.The attack technique deployed by this issue is T1211 according to MITRE ATT&CK. The advisory points out:

A security feature bypass vulnerability exists when urlmon.dll improperly handles certain Mark of the Web queries. The vulnerability allows Internet Explorer to bypass Mark of the Web warnings or restrictions for files downloaded or created in a specific way.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 100371 (Microsoft Internet Explorer Security Update for May 2019).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Entries connected to this vulnerability are available at VDB-134677, VDB-134680, VDB-134726 and VDB-134728. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Microsoft

Name

• Internet Explorer

Version

• 11

License

• commercial

Support

• end of life

Website

• Vendor: https://www.microsoft.com/

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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