CVE-2016-3304
published 2016-08-09CVE-2016-3304: The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Viewer…
PriorityP267high7.8CVSS 3.0
AVLACLPRNUIRSUCHIHAH
EXPLOIT
EPSS
50.51%
98.9th percentile
The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Viewer, Skype for Business 2016, Lync 2013 SP1, Lync 2010, Lync 2010 Attendee, and Live Meeting 2007 Console allows remote attackers to execute arbitrary code via a crafted embedded font, aka "Windows Graphics Component RCE Vulnerability," a different vulnerability than CVE-2016-3303.
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | live_meeting | — | — |
| microsoft | lync | — | — |
| microsoft | lync | — | — |
| microsoft | office | — | — |
| microsoft | office | — | — |
| microsoft | skype_for_business | — | — |
| microsoft | windows_server_2008 | — | — |
| msrc | microsoft_live_meeting_2007_console | — | — |
| msrc | microsoft_lync_2010 | — | — |
| msrc | microsoft_lync_2010_attendee | — | — |
| msrc | microsoft_lync_2013_service_pack_1 | — | — |
| msrc | microsoft_lync_basic_2013_service_pack_1 | — | — |
| msrc | microsoft_office_2007_service_pack_3 | — | — |
| msrc | microsoft_office_2010_service_pack_2 | — | — |
| msrc | microsoft_office_word_viewer | — | — |
| msrc | skype | — | — |
| msrc | windows_7 | — | — |
| msrc | windows_server_2008 | — | — |
| msrc | windows_server_2008_r2 | — | — |
| msrc | windows_vista_service_pack_2 | — | — |
| msrc | windows_vista_x64_edition_service_pack_2 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
pathC:\Windows\winsxs\x86_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.7601.23407_none_5c02a2f5a011f9be\GdiPlus.dll↗
- →Trigger condition: EMF records EMR_EXTTEXTOUTA or EMR_POLYTEXTOUTA with an offDx field pointing to an undersized intercharacter spacing array, combined with a DBCS font charset (e.g. SHIFTJIS_CHARSET) and lead bytes in the text string, causes heap buffer overflow in GDI+ during EMF-to-EMF+ conversion. ↗
- →Exploitation requires a specially crafted .EMF file with a non-standard DBCS encoding (e.g. SHIFTJIS_CHARSET) and lead bytes to reduce MultiByteToWideChar() return value below nChars, triggering the array rewrite overflow path. ↗
- →Attack vectors include opening a crafted Office document (e.g. PowerPoint .pptx) or visiting a web page embedding a malicious EMF font; monitor for Office processes (POWERPNT.EXE, etc.) loading crafted EMF files that invoke GdipConvertToEmfPlus. ↗
- →Vulnerable validation logic: the record size check only verifies 4 bytes at offDx instead of 4*nChars bytes; detection/fuzzing should focus on EMF records where (record_size - offDx) < 4*nChars. ↗
- ·The vulnerable GdiPlus.dll version analysed is 1.1.7601.23407 (pre-patch) on Windows 7 64-bit; the vulnerability also affects Vista SP2, Server 2008 SP2/R2 SP1, Office 2007 SP3, Office 2010 SP2, Word Viewer, Skype for Business 2016, Lync 2013 SP1, Lync 2010, Lync 2010 Attendee, and Live Meeting 2007 Console. ↗
- ·Exploit status per Microsoft: not yet exploited in the wild at time of publication, but rated 'Exploitation More Likely' for both latest and older software releases. ↗
- ·This is a different vulnerability from CVE-2016-3303, though both affect the Windows font library in the same set of products. ↗
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.09.3CRITICALAV:N/AC:M/Au:N/C:C/I:C/A:C
vendor_msrc8.8HIGH
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GHSA
GHSA-4qmp-55x3-xph5: The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Vie
ghsa_unreviewed·2022-05-14·CVSS 7.8
CVE-2016-3303 [HIGH] CWE-20 GHSA-4qmp-55x3-xph5: The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Vie
The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Viewer, Skype for Business 2016, Lync 2013 SP1, Lync 2010, Lync 2010 Attendee, and Live Meeting 2007 Console allows remote attackers to execute arbitrary code via a crafted embedded font, aka "Windows Graphics Component RCE Vulnerability," a different vulnerability than CVE-2016-3304.
GHSA
GHSA-564g-g3h9-2h5g: The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Vie
ghsa_unreviewed·2022-05-14·CVSS 7.8
CVE-2016-3304 [HIGH] CWE-20 GHSA-564g-g3h9-2h5g: The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Vie
The Windows font library in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Office 2007 SP3, Office 2010 SP2, Word Viewer, Skype for Business 2016, Lync 2013 SP1, Lync 2010, Lync 2010 Attendee, and Live Meeting 2007 Console allows remote attackers to execute arbitrary code via a crafted embedded font, aka "Windows Graphics Component RCE Vulnerability," a different vulnerability than CVE-2016-3303.
Microsoft
Microsoft Graphics Remote Code Execution Vulnerability
vendor_msrc·2016-08-09·CVSS 8.8
CVE-2016-3304 [HIGH] Microsoft Graphics Remote Code Execution Vulnerability
Microsoft Graphics Remote Code Execution Vulnerability
Description: A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted embedded fonts. An attacker who successfully exploited the vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
There are multiple ways an attacker could exploit the vulnerability:
In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability and then convince users to view
No detection rules found.
Talos
Microsoft Patch Tuesday - August 2016
blogs_talos·2016-08-09·CVSS 7.8
[HIGH] Microsoft Patch Tuesday - August 2016
This post was authored by Edmund Brumaghin and Jonah Samost
Today is Patch Tuesday for August 2016, and Microsoft has released several security bulletins and associated patches to resolve security issues across their products. This month’s patch release includes 9 bulletins addressing 28 vulnerabilities. Five of the bulletins Microsoft has released are rated Critical and address vulnerabilities in Internet Explorer, Edge, Windows Graphics Component, Microsoft Office, and the Windows PDF library. The remaining four bulletins are rated Important and address vulnerabilities in Windows Kernel-Mode Drivers, Secure Boot, Windows Authentication Methods, and ActiveSyncProvider.
## Bulletins Rated CriticalMicrosoft has listed bulletins MS16-095, MS16-096, MS16-097, MS16-099, MS16-102 as critical
Talos
Microsoft Patch Tuesday - August 2016
blogs_talos·2016-08-09·CVSS 7.8
[HIGH] Microsoft Patch Tuesday - August 2016
## Microsoft Patch Tuesday - August 2016
This post was authored by Edmund Brumaghin and Jonah Samost
Today is Patch Tuesday for August 2016, and Microsoft has released several security bulletins and associated patches to resolve security issues across their products. This month’s patch release includes 9 bulletins addressing 28 vulnerabilities. Five of the bulletins Microsoft has released are rated Critical and address vulnerabilities in Internet Explorer, Edge, Windows Graphics Component, Microsoft Office, and the Windows PDF library. The remaining four bulletins are rated Important and address vulnerabilities in Windows Kernel-Mode Drivers, Secure Boot, Windows Authentication Methods, and ActiveSyncProvider.
## Bulletins Rated Critical Microsoft has listed bulletins MS16-095, MS16-096
http://www.securityfocus.com/bid/92302http://www.securitytracker.com/id/1036564https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-097https://www.exploit-db.com/exploits/40257/http://www.securityfocus.com/bid/92302http://www.securitytracker.com/id/1036564https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-097https://www.exploit-db.com/exploits/40257/
2016-08-09
Published