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Research > Zero-Day Tracker > 20130320

Internet Explorer 9 Memory Disclosure

Date Disclosed:

Date Patched:
Patched in MS13-055


Affected Software:
Internet Explorer 9

Internet Explorer 9 contains a memory disclosure vulnerability that may aid attackers in bypassing ASLR exploit mitigations. The memory disclosure is caused by a function improperly storing a return address in the stack.


Code Execution:
No. Requires a secondary exploit for code execution.

Security Bypass
Use of this vulnerability may allow an attacker to gain insight into how certain information is stored in memory, and possibly bypass ASLR. When combined with a secondary vulnerability, an attacker may achieve remote code execution with the same rights as the currently logged on user.

Internet Explorer 10 is not affected by this issue. Users of Internet Explorer 9 can upgrade to Internet Explorer 10.

BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 18563 – Microsoft Internet Explorer 9 Memory Disclosure (Zero-Day)


2013-03-21: Original Disclosure
2013-07-09: Fixed in MS13-055

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