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exploit-db-mirror/exploits/windows/dos/38714.txt
Offensive Security ed0e1e4d44 DB: 2018-09-25 
1979 changes to exploits/shellcodes

Couchdb 1.5.0 - 'uuids' Denial of Service
Apache CouchDB 1.5.0 - 'uuids' Denial of Service

Beyond Remote 2.2.5.3 - Denial of Service (PoC)
udisks2 2.8.0 - Denial of Service (PoC)
Termite 3.4 - Denial of Service (PoC)
SoftX FTP Client 3.3 - Denial of Service (PoC)

Silverstripe 2.3.5 - Cross-Site Request Forgery / Open redirection
SilverStripe CMS 2.3.5 - Cross-Site Request Forgery / Open Redirection

Silverstripe CMS 3.0.2 - Multiple Vulnerabilities
SilverStripe CMS 3.0.2 - Multiple Vulnerabilities

Silverstripe CMS 2.4 - File Renaming Security Bypass
SilverStripe CMS 2.4 - File Renaming Security Bypass

Silverstripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities
SilverStripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities

Silverstripe CMS 2.4.7 - 'install.php' PHP Code Injection
SilverStripe CMS 2.4.7 - 'install.php' PHP Code Injection

Silverstripe Pixlr Image Editor - 'upload.php' Arbitrary File Upload
SilverStripe CMS Pixlr Image Editor - 'upload.php' Arbitrary File Upload

Silverstripe CMS 2.4.x - 'BackURL' Open Redirection
SilverStripe CMS 2.4.x - 'BackURL' Open Redirection

Silverstripe CMS - 'MemberLoginForm.php' Information Disclosure
SilverStripe CMS - 'MemberLoginForm.php' Information Disclosure

Silverstripe CMS - Multiple HTML Injection Vulnerabilities
SilverStripe CMS - Multiple HTML Injection Vulnerabilities

Apache CouchDB 1.7.0 and 2.x before 2.1.1 - Remote Privilege Escalation
Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation

Monstra CMS before 3.0.4 - Cross-Site Scripting
Monstra CMS < 3.0.4 - Cross-Site Scripting (2)

Monstra CMS < 3.0.4 - Cross-Site Scripting
Monstra CMS < 3.0.4 - Cross-Site Scripting (1)
Navigate CMS 2.8 - Cross-Site Scripting
Collectric CMU 1.0 - 'lang' SQL injection
Joomla! Component CW Article Attachments 1.0.6 - 'id' SQL Injection
LG SuperSign EZ CMS 2.5 - Remote Code Execution
MyBB Visual Editor 1.8.18 - Cross-Site Scripting
Joomla! Component AMGallery 1.2.3 - 'filter_category_id' SQL Injection
Joomla! Component Micro Deal Factory 2.4.0 - 'id' SQL Injection
RICOH Aficio MP 301 Printer - Cross-Site Scripting
Joomla! Component Auction Factory 4.5.5 - 'filter_order' SQL Injection
RICOH MP C6003 Printer - Cross-Site Scripting

Linux/ARM - Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (28 Bytes)
Linux/ARM - sigaction() Based Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (52 Bytes)
2018-09-25 05:01:51 +00:00

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Source: https://code.google.com/p/google-security-research/issues/detail?id=506
We have encountered a number of Windows kernel crashes in the win32k.sys driver while processing a specific corrupted TTF font file. The cleanest stack trace we have acquired, which might also indicate where the pool corruption takes place and/or the root cause of the vulnerability, is shown below:
---
PAGE_FAULT_IN_NONPAGED_AREA (50)
Invalid system memory was referenced. This cannot be protected by try-except,
it must be protected by a Probe. Typically the address is just plain bad or it
is pointing at freed memory.
Arguments:
Arg1: fffff900c4c31000, memory referenced.
Arg2: 0000000000000001, value 0 = read operation, 1 = write operation.
Arg3: fffff96000156a34, If non-zero, the instruction address which referenced the bad memory
address.
Arg4: 0000000000000000, (reserved)
[...]
FAULTING_IP:
win32k!memmove+64
fffff960`00156a34 488901 mov qword ptr [rcx],rax
MM_INTERNAL_CODE: 0
DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT
BUGCHECK_STR: 0x50
CURRENT_IRQL: 0
TRAP_FRAME: fffff880074a0210 -- (.trap 0xfffff880074a0210)
.trap 0xfffff880074a0210
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=fffff47cffffe440 rbx=0000000000000000 rcx=fffff900c4c31000
rdx=000000000141f518 rsi=0000000000000000 rdi=0000000000000000
rip=fffff96000156a34 rsp=fffff880074a03a8 rbp=0000000000000010
r8=0000000000000018 r9=0000000000000001 r10=fffff900c4c211a8
r11=fffff900c4c30ff0 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0 nv up ei pl nz na pe nc
win32k!memmove+0x64:
fffff960`00156a34 488901 mov qword ptr [rcx],rax ds:a020:fffff900`c4c31000=????????????????
.trap
Resetting default scope
LAST_CONTROL_TRANSFER: from fffff800028fa017 to fffff8000287d5c0
STACK_TEXT:
fffff880`074a00a8 fffff800`028fa017 : 00000000`00000050 fffff900`c4c31000 00000000`00000001 fffff880`074a0210 : nt!KeBugCheckEx
fffff880`074a00b0 fffff800`0287b6ee : 00000000`00000001 fffff900`c4c31000 fffff880`074a0400 fffff900`c4c30fd8 : nt! ?? ::FNODOBFM::`string'+0x4174f
fffff880`074a0210 fffff960`00156a34 : fffff960`00252e40 fffff900`c4c30f98 00000000`00000003 fffff900`c48f2eb0 : nt!KiPageFault+0x16e
fffff880`074a03a8 fffff960`00252e40 : fffff900`c4c30f98 00000000`00000003 fffff900`c48f2eb0 fffff960`002525dc : win32k!memmove+0x64
fffff880`074a03b0 fffff960`0031d38e : 00000000`000028a6 fffff900`c4c30fd8 00000000`00000000 fffff900`c4c21008 : win32k!EPATHOBJ::bClone+0x138
fffff880`074a0400 fffff960`000f07bb : fffff880`00002640 fffff900`c576aca0 00000000`00002640 fffff880`00000641 : win32k!RFONTOBJ::bInsertMetricsPlusPath+0x17e
fffff880`074a0540 fffff960`000eccf7 : fffff880`074a2640 fffff880`074a0a68 fffff880`074a0b40 fffff800`00000641 : win32k!xInsertMetricsPlusRFONTOBJ+0xe3
fffff880`074a0610 fffff960`000ec998 : fffff880`074a0b40 fffff880`074a0a68 fffff900`c0480014 00000000`00000179 : win32k!RFONTOBJ::bGetGlyphMetricsPlus+0x1f7
fffff880`074a0690 fffff960`000ec390 : fffff980`00000000 fffff880`074a0830 fffff900`c04a8000 fffff800`00000008 : win32k!ESTROBJ::vCharPos_H3+0x168
fffff880`074a0710 fffff960`000ed841 : 00000000`41800000 00000000`00000000 00000000`0000000a fffff880`074a0830 : win32k!ESTROBJ::vInit+0x350
fffff880`074a07a0 fffff960`000ed4ef : fffff880`074a0ca0 fffff900`c576aca0 ffffd08c`00000020 ffffffff`ffffffff : win32k!GreGetTextExtentExW+0x275
fffff880`074a0a60 fffff800`0287c853 : 00000000`00000000 fffff880`074a0ca0 00000000`00000001 fffff880`00000000 : win32k!NtGdiGetTextExtentExW+0x237
fffff880`074a0bb0 00000000`750a213a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`0025e1c8 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x750a213a
---
We have also observed a number of other system bugchecks caused by the particular TTF file with various stack traces indicating a pool corruption condition. For example, on Windows 7 32-bit a crash occurs only while deleting the font, under the following call stack:
---
9823bc7c 90d8dec1 fb634cf0 fb60ecf0 00000001 win32k!RFONTOBJ::vDeleteCache+0x56
9823bca8 90d14209 00000000 00000000 00000001 win32k!RFONTOBJ::vDeleteRFONT+0x190
9823bcd0 90d15e00 9823bcf4 fb62ccf0 00000000 win32k!PUBLIC_PFTOBJ::bLoadFonts+0x6fb
9823bd00 90ddf48e 00000008 fbc16ff8 912f8fc8 win32k!PFTOBJ::bUnloadWorkhorse+0x114
9823bd28 8267ea06 13000117 0040fa24 775e71b4 win32k!GreRemoveFontMemResourceEx+0x60
9823bd28 775e71b4 13000117 0040fa24 775e71b4 nt!KiSystemServicePostCall
---
While we have not determined the specific root cause of the vulnerability, we have pinpointed the offending mutations to reside in the "OS/2" table.
The issue reproduces on Windows 7 (32 and 64-bit). It is easiest to reproduce with Special Pools enabled for win32k.sys (leading to an immediate crash when the bug is triggered), but it it also possible to observe a system crash on a default Windows installation as a consequence of pool corruption and resulting system instability. In order to reproduce the problem with the provided sample, it might be necessary to use a custom program which displays all of the font's glyphs at various point sizes.
Attached is an archive with the proof-of-concept mutated TTF file, together with the original font used to generate it and a corresponding kernel crash log from Windows 7 64-bit.
Proof of Concept:
https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/38714.zip
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