Microsoft Excel 2007 SP3/2010 SP2/2011/2016 Office Document memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.6$0-$5k0.00

A vulnerability classified as critical was found in Microsoft Excel 2007 SP3/2010 SP2/2011/2016 (Spreadsheet Software). This vulnerability affects an unknown part of the component Office Document Handler. 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. CVE summarizes:

Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel for Mac 2011 and 2016, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

The weakness was released 09/08/2015 by Steven Vittitoe with Google Project Zero as MS15-099 as confirmed bulletin (Technet). The advisory is available at technet.microsoft.com. This vulnerability was named CVE-2015-2520 since 03/19/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Google Security Research and been published 2 weeks after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 85878 (MS15-099: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3089664) (Mac OS X)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110259 (Microsoft Office Remote Code Execution Vulnerabilities (MS15-099)).

Applying the patch MS15-099 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 21012.

The vulnerability is also documented in the databases at Exploit-DB (38215), Tenable (85878), SecurityFocus (BID 76561†), SecurityTracker (ID 1033488†) and Vulnerability Center (SBV-52499†). Entries connected to this vulnerability are available at VDB-77627, VDB-77628, VDB-77629 and VDB-77646.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 85878
Nessus Name: MS15-099: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3089664) (Mac OS X)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 802074
OpenVAS Name: Microsoft Office Multiple Remote Code Execution Vulnerabilities-3089664 (Mac OS X)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Patch: MS15-099
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 🔍
09/16/2015 +7 days 🔍
09/16/2015 +0 days 🔍
06/24/2024 +3204 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS15-099
Researcher: Steven Vittitoe
Organization: Google Project Zero
Status: Confirmed

CVE: CVE-2015-2520 (🔍)
SecurityFocus: 76561 - Microsoft Office CVE-2015-2520 Memory Corruption Vulnerability
SecurityTracker: 1033488
Vulnerability Center: 52499 - [MS15-099] Microsoft Office Remote Code Execution Vulnerability due to Memory Corruption - CVE-2015-2520, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/09/2015 10:05 AM
Updated: 06/24/2024 02:55 PM
Changes: 09/09/2015 10:05 AM (66), 12/09/2017 12:04 PM (24), 06/14/2022 03:30 PM (3), 06/24/2024 02:55 PM (15)
Complete: 🔍
Cache ID: 18:F6C:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!