Microsoft Internet Explorer 8 VBScript/JScript Engine memory corruption

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

Summaryinfo

A vulnerability has been found in Microsoft Internet Explorer 8 and classified as critical. Affected by this vulnerability is an unknown functionality of the component VBScript/JScript Engine. This manipulation causes memory corruption. This vulnerability is registered as CVE-2015-2493. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 8 (Web Browser). It has been declared as critical. Affected by this vulnerability is an unknown part of the component VBScript/JScript Engine. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The (1) VBScript and (2) JScript engines in Microsoft Internet Explorer 8 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability."

The weakness was published 09/08/2015 with Palo Alto Networks as MS15-094 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. This vulnerability is known as CVE-2015-2493 since 03/19/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 $0-$5k at the moment (estimation calculated on 06/14/2022). It is expected to see the exploit prices for this product decreasing in the near future.

The vulnerability scanner Nessus provides a plugin with the ID 85845 (MS15-094: Cumulative Security Update for Internet Explorer (3089548)), 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 100257 (Microsoft Internet Explorer Cumulative Security Update (MS15-094)).

Applying the patch MS15-094 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 20902.

The vulnerability is also documented in the databases at Tenable (85845), SecurityFocus (BID 76575†), SecurityTracker (ID 1033487†) and Vulnerability Center (SBV-52502†). Similar entries are available at VDB-77596, VDB-77597, VDB-77598 and VDB-77599. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 85845
Nessus Name: MS15-094: Cumulative Security Update for Internet Explorer (3089548)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Patch: MS15-094
TippingPoint: 🔍
Fortigate IPS: 🔍

Timelineinfo

03/19/2015 🔍
09/08/2015 +173 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/08/2015 +0 days 🔍
09/09/2015 +1 days 🔍
09/09/2015 +0 days 🔍
06/14/2022 +2470 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS15-094
Organization: Palo Alto Networks
Status: Confirmed

CVE: CVE-2015-2493 (🔍)
GCVE (CVE): GCVE-0-2015-2493
GCVE (VulDB): GCVE-100-77605
SecurityFocus: 76575 - Microsoft Internet Explorer CVE-2015-2493 Scripting Engines Remote Memory Corruption Vulnerability
SecurityTracker: 1033487 - Microsoft Internet Explorer Multiple Bugs Let Remote Users Obtain Potentially Sensitive Information, Gain Elevated Privileges, Delete Files, and Execute Arbitrary Code
Vulnerability Center: 52502 - [MS15-094] Microsoft Internet Explorer 8 Remote Code Execution due to Scripting Engine Memory Corruption, Critical

See also: 🔍

Entryinfo

Created: 09/09/2015 10:02
Updated: 06/14/2022 13:26
Changes: 09/09/2015 10:02 (67), 04/07/2017 12:14 (12), 06/14/2022 13:26 (2)
Complete: 🔍
Cache ID: 216::103

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