Microsoft Windows EPATHOBJ::pprFlattenRec memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Microsoft Windows. Affected by this issue is the function EPATHOBJ::pprFlattenRec. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2013-3660. It is possible to launch the attack on the local host. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in Microsoft Windows (Operating System) (the affected version unknown). It has been declared as critical. This vulnerability affects the function EPATHOBJ::pprFlattenRec. 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:

The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, and Windows Server 2012 does not properly initialize a pointer for the next object in a certain list, which allows local users to obtain write access to the PATHRECORD chain, and consequently gain privileges, by triggering excessive consumption of paged memory and then making many FlattenPath function calls, aka "Win32k Read AV Vulnerability."

The weakness was released 05/24/2013 (Website). The advisory is available at us-cert.gov. This vulnerability was named CVE-2013-3660. Local access is required to approach this attack. A single authentication is necessary for exploitation. Technical details and also a exploit are known.

It is possible to download the exploit at exploit-db.com. It is declared as attacked. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 66878 (Microsoft Windows Kernel Win32k.sys PATHRECORD chain Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90894 (Microsoft Windows Kernel-Mode Drivers Remote Code Execution (MS13-053)). This issue was added on 03/28/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 04/18/2022:

Apply updates per vendor instructions.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (84391), Zero-Day.cz (376), Tenable (66878), SecurityFocus (BID 60051†) and OSVDB (93539†). Entries connected to this vulnerability are available at VDB-8829, VDB-9398, VDB-9399 and VDB-9400. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.8
VulDB Temp Score: 7.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

ADP CISA Base Score: 7.8
ADP CISA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
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KEV Remediation: 🔍
KEV Ransomware: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 66878
Nessus Name: Microsoft Windows Kernel Win32k.sys PATHRECORD chain Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 902978
OpenVAS Name: MS Windows Kernel-Mode Drivers Remote Code Execution Vulnerabilities (2850851)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ppr_flatten_rec.rb
MetaSploit Name: Windows EPATHOBJ::pprFlattenRec Local Privilege Escalation
MetaSploit File: 🔍

Exploit-DB: 🔍
Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/17/2013 🔍
05/24/2013 +6 days 🔍
05/24/2013 +0 days 🔍
05/24/2013 +0 days 🔍
06/12/2013 +19 days 🔍
06/16/2013 +4 days 🔍
03/24/2015 +646 days 🔍
04/22/2026 +4047 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: us-cert.gov
Status: Confirmed

CVE: CVE-2013-3660 (🔍)
GCVE (CVE): GCVE-0-2013-3660
GCVE (VulDB): GCVE-100-64186

OVAL: 🔍
IAVM: 🔍

X-Force: 84391
SecurityFocus: 60051
Secunia: 53435
OSVDB: 93539
Vulnerability Center: 40001 - [MS13-053] Microsoft Windows win32k.sys \x27EPATHOBJ::pprFlattenRec\x27 Function Allows Local Write Access and Possible Privilege escalation, High

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

Entryinfo

Created: 03/24/2015 15:54
Updated: 04/22/2026 13:10
Changes: 03/24/2015 15:54 (39), 04/07/2017 16:05 (28), 01/02/2022 20:05 (3), 01/02/2022 20:12 (7), 01/02/2022 20:20 (1), 04/24/2024 19:14 (24), 07/09/2024 21:26 (11), 07/14/2024 07:10 (2), 09/09/2024 22:30 (1), 05/14/2025 19:09 (3), 04/22/2026 13:10 (9)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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