Microsoft Internet Explorer 11 GetBlockText memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Microsoft Internet Explorer 11 (Web Browser). Affected by this issue is the function CTextExtractor::GetBlockText. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Microsoft Internet Explorer 11 and Microsoft Edge allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Microsoft Browser Memory Corruption Vulnerability."

The weakness was shared 09/13/2016 by SkyLined with Zero Day Initiative (ZDI) as MS16-104 as confirmed bulletin (Technet). The advisory is available at technet.microsoft.com. This vulnerability is handled as CVE-2016-3247 since 03/15/2016. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 93465 (MS16-105: Cumulative Security Update for Microsoft Edge (3183043)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 100295 (Microsoft Cumulative Security Update for Internet Explorer (MS16-104)).

Applying the patch MS16-104 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (93465) and Exploit-DB (40797). seclists.org is providing further details. The entries 91515, 91516, 91517 and 91518 are related to this item.

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  • end of life

CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.0
VulDB Temp Score: 4.5
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NVD Base Score: 7.5
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CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 93465
Nessus Name: MS16-105: Cumulative Security Update for Microsoft Edge (3183043)
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 71170
OpenVAS Name: Microsoft Internet Explorer Multiple Vulnerabilities (3183038)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: MS16-104

Timelineinfo

03/15/2016 🔍
09/13/2016 +182 days 🔍
09/13/2016 +0 days 🔍
09/13/2016 +0 days 🔍
09/14/2016 +1 days 🔍
09/14/2016 +0 days 🔍
09/16/2022 +2193 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS16-104
Researcher: SkyLined
Organization: Zero Day Initiative (ZDI)
Status: Confirmed

CVE: CVE-2016-3247 (🔍)
SecurityTracker: 1036788
SecurityFocus: 92828 - Microsoft Internet Explorer and Edge CVE-2016-3247 Remote Memory Corruption Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
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Entryinfo

Created: 09/14/2016 16:48
Updated: 09/16/2022 08:11
Changes: 09/14/2016 16:48 (72), 04/07/2017 18:28 (14), 09/16/2022 08:11 (3)
Complete: 🔍

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