Microsoft Internet Explorer 8/9/10/11 VBScript/JScript Engine RegExpBase::FBadHeader memory corruption

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

A vulnerability was found in Microsoft Internet Explorer 8/9/10/11 (Web Browser). It has been rated as critical. Affected by this issue is the function RegExpBase::FBadHeader of the component VBScript/JScript Engine. 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:

The Microsoft (1) VBScript 5.7 and 5.8 and (2) JScript 5.7 and 5.8 engines, as used in Internet Explorer 8 through 11 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted replace operation with a JavaScript regular expression, aka "Scripting Engine Memory Corruption Vulnerability."

The weakness was disclosed 10/13/2015 by SkyLined with Zero Day Initiative as MS15-108 as confirmed bulletin (Technet). The advisory is available at technet.microsoft.com. This vulnerability is handled as CVE-2015-2482 since 03/19/2015. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 86367 (MS15-106: Cumulative Security Update for Internet Explorer (3096441)), 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 100259 (Microsoft Internet Explorer Cumulative Security Update (MS15-106)).

Applying the patch MS15-108 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. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 21198.

The vulnerability is also documented in the vulnerability database at Tenable (86367). trustwave.com is providing further details. The entries 78363, 78364, 78365 and 78366 are pretty similar.

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  • end of life

CPE 2.3info

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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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Local: No
Remote: Yes

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Status: Proof-of-Concept
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Nessus ID: 86367
Nessus Name: MS15-106: Cumulative Security Update for Internet Explorer (3096441)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: MS15-108
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Timelineinfo

03/19/2015 🔍
10/13/2015 +208 days 🔍
10/13/2015 +0 days 🔍
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10/13/2015 +0 days 🔍
10/13/2015 +0 days 🔍
10/13/2015 +0 days 🔍
10/14/2015 +1 days 🔍
10/14/2015 +0 days 🔍
06/20/2022 +2441 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS15-108
Researcher: SkyLined
Organization: Zero Day Initiative
Status: Confirmed

CVE: CVE-2015-2482 (🔍)
SecurityTracker: 1033800 - Microsoft Internet Explorer Multiple Bugs Let Remote Users Bypass ASLR, Obtain Potentially Sensitive Information, Gain Elevated Privileges, and Execute Arbitrary Code
Vulnerability Center: 53379 - [MS15-106, MS15-108] Microsoft Internet Explorer, JScript and VBScript Remote Code Execution due to Scripting Engine Memory Corruption, Critical
SecurityFocus: 77007 - Microsoft VBScript and JScript CVE-2015-2482 Remote Memory Corruption Vulnerability

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Entryinfo

Created: 10/14/2015 10:33
Updated: 06/20/2022 16:42
Changes: 10/14/2015 10:33 (72), 04/07/2017 12:14 (11), 06/20/2022 16:35 (2), 06/20/2022 16:42 (1)
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