CVE-2017-11903

HIGH

Microsoft Windows - Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-11903. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a use-after-free vulnerability in jscript.dll (CVE-2017-11903) by manipulating garbage collection during object conversion to a string. It triggers a crash in NameTbl::GetValDef, demonstrating potential for RCE in Internet Explorer or via WPAD.

Description

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to gain the same user rights as the current user, due to how Internet Explorer handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-11886, CVE-2017-11889, CVE-2017-11890, CVE-2017-11893, CVE-2017-11894, CVE-2017-11895, CVE-2017-11901, CVE-2017-11905, CVE-2017-11907, CVE-2017-11908, CVE-2017-11909, CVE-2017-11910, CVE-2017-11911, CVE-2017-11912, CVE-2017-11913, CVE-2017-11914, CVE-2017-11916, CVE-2017-11918, and CVE-2017-11930.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmldoswindows
https://www.exploit-db.com/exploits/43367

This PoC exploits a use-after-free vulnerability in jscript.dll (CVE-2017-11903) by manipulating garbage collection during object conversion to a string. It triggers a crash in NameTbl::GetValDef, demonstrating potential for RCE in Internet Explorer or via WPAD.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Racy
Target: Microsoft Internet Explorer (jscript.dll), Windows 7 64-bit
No auth needed
Prerequisites: Victim visits malicious webpage or receives malicious WPAD file
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/102047
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039991
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/43367/

Scores

CVSS v3 7.5
EPSS 0.6083
EPSS Percentile 98.3%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (4)
microsoft/internet_explorer 11
microsoft/internet_explorer 10
microsoft/internet_explorer 9
Microsoft Corporation/Internet Explorer Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Ser
Published Dec 12, 2017
Tracked Since Feb 18, 2026