Microsoft Internet Explorer 10/11 memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft Internet Explorer 10/11. The impacted element is an unknown function. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2018-8118. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Internet Explorer 10/11 (Web Browser). This affects some unknown functionality. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka "Internet Explorer Memory Corruption Vulnerability." This affects Internet Explorer 11, Internet Explorer 10.

The bug was discovered 04/06/2018. The weakness was disclosed 04/06/2018 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2018-8118 since 03/14/2018. 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. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/03/2023). It is expected to see the exploit prices for this product decreasing in the near future. The advisory points out:

A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, the attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

The vulnerability scanner Nessus provides a plugin with the ID 108295 (Security Updates for Internet Explorer (March 2018)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 100331 (Microsoft Internet Explorer Security Update for March 2018).

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

The vulnerability is also documented in the vulnerability database at Tenable (108295). The entries VDB-114504, VDB-114568, VDB-114569 and VDB-114572 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Microsoft

Name

• Internet Explorer

Version

• 10
• 11

License

• commercial

Support

• end of life

Website

• Vendor: https://www.microsoft.com/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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