Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 Uniscribe memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2. The affected element is an unknown function of the component Uniscribe. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2017-8696. 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 Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 (Operating System). This affects some unknown processing of the component Uniscribe. 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:

Windows Uniscribe in Microsoft Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Office 2007 SP3; Office 2010 SP2; Word Viewer; Office for Mac 2011 and 2016; Skype for Business 2016; Lync 2013 SP1; Lync 2010; Lync 2010 Attendee; and Live Meeting 2007 Add-in and Console allows an attacker to execute code remotely via a specially crafted website or a specially crafted document or email attachment, aka "Microsoft Graphics Component Remote Code Execution."

The bug was discovered 09/12/2017. The weakness was disclosed 09/12/2017 as KB4039384 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2017-8696 since 05/03/2017. The exploitability is told to be difficult. 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 01/12/2021). The advisory points out:

A remote code execution vulnerability exists due to the way Windows Uniscribe handles objects in memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

The vulnerability scanner Nessus provides a plugin with the ID 103127 (Windows 7 and Windows Server 2008 R2 September 2017 Security Updates), 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 110304 (Microsoft Lync and Skype for Business Security Update for September 2017).

Applying the patch KB4039384 is able to eliminate this problem. The bugfix is ready for download at catalog.update.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 (103127) and SecurityFocus (BID 100780†). The entries VDB-106502, VDB-106454, VDB-106472 and VDB-106481 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.5
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp 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: 103127
Nessus Name: Windows 7 and Windows Server 2008 R2 September 2017 Security Updates
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800623
OpenVAS Name: Microsoft Lync Attendee Multiple Remote Code Execution Vulnerabilities (KB4025866 and KB4025867)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: KB4039384

Timelineinfo

05/03/2017 🔍
09/12/2017 +132 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/13/2017 +1 days 🔍
01/12/2021 +1217 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: KB4039384
Researcher: Axel Souchet
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8696 (🔍)
GCVE (CVE): GCVE-0-2017-8696
GCVE (VulDB): GCVE-100-106497

OVAL: 🔍

SecurityFocus: 100780 - Microsoft Windows Graphics Component CVE-2017-8696 Remote Code Execution Vulnerability
SecurityTracker: 1039344

scip Labs: https://www.scip.ch/en/?labs.20140213
See also: 🔍

Entryinfo

Created: 09/13/2017 13:25
Updated: 01/12/2021 07:40
Changes: 09/13/2017 13:25 (85), 11/15/2019 15:08 (11), 01/12/2021 07:37 (2), 01/12/2021 07:40 (1)
Complete: 🔍
Cache ID: 216::103

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

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