CVE-2015-2455

Microsoft .NET Framework - Remote Code Execution via TrueType Font Parsing

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2015-2455. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit demonstrates a pool-based buffer overflow in the Windows kernel's win32k!itrp_IUP function due to improper handling of malformed TTF font files. The vulnerability arises from the lack of validation for the SZP2[] instruction with a 0 argument, leading to remote code execution in kernel context.

Description

Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, Windows 10, Office 2007 SP3 and 2010 SP2, Live Meeting 2007 Console, Lync 2010, Lync 2010 Attendee, Lync 2013 SP1, Lync Basic 2013 SP1, Silverlight before 5.1.40728, and .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6 allow remote attackers to execute arbitrary code via a crafted TrueType font, aka "TrueType Font Parsing Vulnerability," a different vulnerability than CVE-2015-2456.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textdoswindows
https://www.exploit-db.com/exploits/37919

This exploit demonstrates a pool-based buffer overflow in the Windows kernel's win32k!itrp_IUP function due to improper handling of malformed TTF font files. The vulnerability arises from the lack of validation for the SZP2[] instruction with a 0 argument, leading to remote code execution in kernel context.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows 7 and 8.1 (win32k.sys)
No auth needed
Prerequisites: Malformed TTF font file with specific SZP2[] and IUP[] instructions
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Patch, Vendor Advisory vendor-advisory x_refsource_ms
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-080
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/37919/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1033238
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/76216

Scores

EPSS 0.3743
EPSS Percentile 98.3%

Details

CWE
CWE-20
Status published
Products (26)
microsoft/.net_framework 3.0 sp2
microsoft/.net_framework 4.0
microsoft/.net_framework 4.5
microsoft/.net_framework 4.5.1
microsoft/.net_framework 4.5.2
microsoft/.net_framework 4.6
microsoft/.net_framework 3.5.1
microsoft/.net_framework 3.5
microsoft/live_meeting 2007
microsoft/lync 2010 (2 CPE variants)
... and 16 more
Published Aug 15, 2015
Tracked Since Feb 18, 2026