Microsoft Windows numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as critical has been found in Microsoft Windows (Operating System) (the affected version is unknown). This affects an unknown code. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow in the Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, and Windows Server 2003 SP2, allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that triggers an incorrect memory assignment for a user transaction, aka "CSRSS Local EOP SrvWriteConsoleOutputString Vulnerability."

The weakness was published 07/13/2011 by j00ru with Hispasec (Website). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-2011-1870. The exploitability is told to be easy. Attacking locally is a requirement. A authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/14/2021).

The vulnerability scanner Nessus provides a plugin with the ID 55572 (MS11-056: Vulnerabilities in Windows Client/Server Run-time Subsystem Could Allow Elevation of Privilege (2507938)), 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 90719 (Microsoft Windows Client/Server Runtime Subsystem Elevation of Privilege Vulnerability (MS11-056)).

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 (67749) and Tenable (55572). Similar entries are available at 4382, 54556, 57929 and 57928.






CPE 2.3info

CPE 2.2info


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


VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍



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

NVD Base Score: 🔍


Class: Numeric error
CWE: CWE-189
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 55572
Nessus Name: MS11-056: Vulnerabilities in Windows Client/Server Run-time Subsystem Could Allow Elevation of Privilege (2507938)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 902609
OpenVAS Name: Microsoft Windows CSRSS Privilege Escalation Vulnerabilities (2507938)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


05/04/2011 🔍
07/12/2011 +69 days 🔍
07/12/2011 +0 days 🔍
07/13/2011 +1 days 🔍
07/13/2011 +0 days 🔍
07/13/2011 +0 days 🔍
03/23/2015 +1349 days 🔍
11/14/2021 +2428 days 🔍



Researcher: j00ru
Organization: Hispasec
Status: Not defined

CVE: CVE-2011-1870 (🔍)

X-Force: 67749
Vulnerability Center: 32256 - [MS11-056] Microsoft Windows XP and Windows Server 2003 Local Privilege Escalation (CVE-2011-1870), High
SecurityFocus: 48605 - Microsoft Windows CSRSS 'SrvWriteConsoleOutputString()' Local Privilege Escalation Vulnerability
OSVDB: 73795

See also: 🔍


Created: 03/23/2015 04:50 PM
Updated: 11/14/2021 10:07 AM
Changes: 03/23/2015 04:50 PM (58), 04/07/2017 04:04 PM (12), 11/14/2021 10:03 AM (2), 11/14/2021 10:07 AM (1)
Complete: 🔍


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