// For flags

CVE-2009-1531

Microsoft Internet Explorer onreadystatechange Memory Corruption Vulnerability

Severity Score

9.3
*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Microsoft Internet Explorer 7 for Windows XP SP2 and SP3; 7 for Server 2003 SP2; 7 for Vista Gold, SP1, and SP2; and 7 for Server 2008 SP2 allows remote attackers to execute arbitrary code via frequent calls to the getElementsByTagName function combined with the creation of an object during reordering of elements, followed by an onreadystatechange event, which triggers an access of an object that (1) was not properly initialized or (2) is deleted, aka "HTML Object Memory Corruption Vulnerability."

Microsoft Internet Explorer 7 para Windows XP SP2 y SP3; 7 para Server 2003 SP2; 7 para Vista Gold, SP1 y SP2; y 7 para Server 2008 SP2 permite a los atacantes remotos ejecutar código arbitrario por medio de llamadas frecuentes a la función getElementsByTagName combinada con la creación de un objeto durante el reordenamiento de elementos, seguida por un evento onReadyStateChange, que desencadena un acceso de un objeto que (1) no se inicializó apropiadamente o (2) se elimina, también se conoce como "HTML Object Memory Corruption Vulnerability".

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.
The specific flaw exists when repeated calls are made to getElementsByTagName() and the reordering of the elements in the document causes an object to be allocated. The use of the event "onreadystatechange" during this operation improperly frees the previously allocated resource. The combination, with repeated page rendering, leads to the exploitable memory corruption.

*Credits: ling&wushi of team509
CVSS Scores
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
  • 2009-05-05 CVE Reserved
  • 2009-06-10 CVE Published
  • 2024-08-07 CVE Updated
  • 2024-10-07 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-399: Resource Management Errors
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
Search vendor "Microsoft"
Internet Explorer
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7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2003
Search vendor "Microsoft" for product "Windows Server 2003"
*-
Safe
Microsoft
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Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2003
Search vendor "Microsoft" for product "Windows Server 2003"
*sp1
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2003
Search vendor "Microsoft" for product "Windows Server 2003"
*sp1, itanium
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2003
Search vendor "Microsoft" for product "Windows Server 2003"
*sp2
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2008
Search vendor "Microsoft" for product "Windows Server 2008"
*-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2008
Search vendor "Microsoft" for product "Windows Server 2008"
*32_bit
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2008
Search vendor "Microsoft" for product "Windows Server 2008"
*itanium
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2008
Search vendor "Microsoft" for product "Windows Server 2008"
*x64
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Vista
Search vendor "Microsoft" for product "Windows Vista"
*-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Vista
Search vendor "Microsoft" for product "Windows Vista"
*x64
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Vista
Search vendor "Microsoft" for product "Windows Vista"
*sp1
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Vista
Search vendor "Microsoft" for product "Windows Vista"
gold
Search vendor "Microsoft" for product "Windows Vista" and version "gold"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Xp
Search vendor "Microsoft" for product "Windows Xp"
*x64
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Xp
Search vendor "Microsoft" for product "Windows Xp"
*sp2
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Xp
Search vendor "Microsoft" for product "Windows Xp"
*sp2, x64
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
7
Search vendor "Microsoft" for product "Internet Explorer" and version "7"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Xp
Search vendor "Microsoft" for product "Windows Xp"
*sp3
Safe