CVE-2011-2883

Severity Score

9.3

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx in Citrix Access Gateway Enterprise Edition 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4 attempts to validate signed DLLs by checking the certificate subject, not the signature, which allows man-in-the-middle attackers to execute arbitrary code via HTTP header data referencing a DLL that was signed with a crafted certificate.

El control activeX NSEPA.NsepaCtrl.1 en nsepa.ocx de Citrix Access Gateway Enterprise Edition v8.1 antes de v8.1-67.7, v9.0 antes de v9.0-70.5 y v9.1 antes de v9.1-96.4 intenta validar archivos DLL firmados mediante el control del asunto del certificado en lugar de la firma, que permite a los atancante de hombre en el medio ejecutar código arbitrario a través de datos de cabecera HTTP que referencian a una DLL firmada por un certificado manipulado.

*Credits: N/A

CVSS Scores

NISTv2 9.3

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2011-07-21 CVE Reserved
2011-07-21 CVE Published
2024-04-25 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (1)

URL	Tag	Source
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=928	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Citrix Search vendor "Citrix"		Access Gateway Search vendor "Citrix" for product "Access Gateway"				8.1 Search vendor "Citrix" for product "Access Gateway" and version "8.1"		enterprise		Affected
Citrix Search vendor "Citrix"		Access Gateway Search vendor "Citrix" for product "Access Gateway"				9.0 Search vendor "Citrix" for product "Access Gateway" and version "9.0"		enterprise		Affected
Citrix Search vendor "Citrix"		Access Gateway Search vendor "Citrix" for product "Access Gateway"				9.1 Search vendor "Citrix" for product "Access Gateway" and version "9.1"		enterprise		Affected