Microsoft Windows Kernel - 'IOCTL 0x120007 NsiGetParameter' nsiproxy/netio Pool Memory Disclosure

/ We have discovered that the handler of the 0x120007 IOCTL in nsiproxy.sys \.\Nsi device discloses portions of uninitialized pool memory to user-mode clients, likely due to output structure alignment holes. On our test Windows 7 32-bit workstation, an example layout of the output buffer is as...

Microsoft Windows Kernel - ATMFD.DLL Out-of-Bounds Read due to Malformed Name INDEX in the CFF Table

Microsoft Windows Kernel - ATMFD.DLL Out-of-Bounds Read due to Malformed Name INDEX in the CFF Table Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1213 We have encountered a Windows kernel crash in the ATMFD.DLL OpenType driver while processing a corrupted OTF font file, see...

Microsoft Windows Kernel - 'ATMFD.DLL' Out-of-Bounds Read due to Malformed Name INDEX in the CFF Table

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1213 We have encountered a Windows kernel crash in the ATMFD.DLL OpenType driver while processing a corrupted OTF font file, see below: --- DRIVERPAGEFAULTBEYONDENDOFALLOCATION d6 N bytes of memory was allocated and more than N byt...

Microsoft Windows Kernel win32k.sys - Multiple Bugs in the NtGdiGetDIBitsInternal System Call Exploi

Exploit for windows platform in category dos / poc Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1078 We have discovered two bugs in the implementation of the win32k!NtGdiGetDIBitsInternal system call, which is a part of the graphic subsystem in all modern versions of Windows...

Microsoft Windows Kernel - 'win32k.sys' Multiple 'NtGdiGetDIBitsInternal' System Call

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1078 We have discovered two bugs in the implementation of the win32k!NtGdiGetDIBitsInternal system call, which is a part of the graphic subsystem in all modern versions of Windows. The issues can potentially lead to kernel pool...

Microsoft Windows Kernel - Registry Hive Loading Crashes in nt!nt!HvpGetBinMemAlloc / nt!ExpFindAndRemoveTagBigPages (MS17-017)

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=993 We have encountered Windows kernel crashes in the internal nt!nt!HvpGetBinMemAlloc and nt!ExpFindAndRemoveTagBigPages functions while loading corrupted registry hive files. We believe both crashes to be caused by the same bug...

Microsoft Windows Kernel - win32k.sys NtSetWindowLongPtr Local Privilege Escalation (MS16-135) (1)

Microsoft Windows Kernel - win32k.sys NtSetWindowLongPtr Local Privilege Escalation MS16-135 1 Complete Proof of Concept: https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/40823.zip Presentation:...

Microsoft Windows Kernel - Registry Hive Loading Negative RtlMoveMemory Size in nt!CmpCheckValueList (MS16-124)

Microsoft Windows Kernel - Registry Hive Loading Negative RtlMoveMemory Size in nt!CmpCheckValueList MS16-124 Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=873 We have encountered Windows kernel crashes in the memmove function called by nt!CmpCheckValueList while loading...

Microsoft Windows Kernel - Registry Hive Loading Relative Arbitrary Read in nt!RtlValidRelativeSecurityDescriptor (MS16-123)

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=876 We have encountered a Windows kernel crash in the nt!RtlValidRelativeSecurityDescriptor function invoked by nt!CmpValidateHiveSecurityDescriptors while loading corrupted registry hive files. An example of a crash log excerpt...

Microsoft Windows Kernel - win32k.sys TTF Processing EBLC EBSC Tables Pool Corruption (MS16-039)

Microsoft Windows Kernel - win32k.sys TTF Processing EBLC EBSC Tables Pool Corruption MS16-039 Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=684 We have encountered a Windows kernel crash in the win32k.sys driver while processing a corrupted TTF font file. An example of a cras...

Microsoft Windows Kernel - 'win32k.sys' TTF Processing EBLC / EBSC Tables Pool Corruption (MS16-039)

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=684 We have encountered a Windows kernel crash in the win32k.sys driver while processing a corrupted TTF font file. An example of a crash log excerpt generated after triggering the bug is shown below: --- BADPOOLHEADER 19 The pool ...

Microsoft Windows Kernel - 'NtGdiGetTextExtentExW' Out-of-Bounds Memory Read

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=685 The attached Proof-of-Concept crashes Windows 7 with special pool enabled on win32k.sys. The crash is due accessing memory past the end of a buffer. Proof of Concept:...

MS16-005: Description of the security update for Windows kernel-mode drivers: January 12, 2016 (KB3124001)

None None...

Microsoft Windows Kernel win32k!OffsetChildren - Null Pointer Dereference

Exploit for windows platform in category dos / poc Source: https://code.google.com/p/google-security-research/issues/detail?id=544 The attached PoC triggers a null pointer vulnerability in OffsetChildren on Windows 7 32-bit. By mapping the null page an attacker can leverage this vulnerability to...

Microsoft Windows Kernel - win32k!OffsetChildren Null Pointer Dereference

Microsoft Windows Kernel - win32k!OffsetChildren Null Pointer Dereference Source: https://code.google.com/p/google-security-research/issues/detail?id=544 The attached PoC triggers a null pointer vulnerability in OffsetChildren on Windows 7 32-bit. By mapping the null page an attacker can leverage...

Microsoft Windows Kernel - 'win32k!OffsetChildren' Null Pointer Dereference

Source: https://code.google.com/p/google-security-research/issues/detail?id=544 The attached PoC triggers a null pointer vulnerability in OffsetChildren on Windows 7 32-bit. By mapping the null page an attacker can leverage this vulnerability to write to an arbitrary address. --- Proof of Concept...

Microsoft Windows Kernel - Device Contexts and NtGdiSelectBitmap Use-After-Free (MS15-115)

Source: https://code.google.com/p/google-security-research/issues/detail?id=505 The attached testcase triggers a use-after-free condition in win32k. The attached debugger output was triggered on Windows 7 with Special Pool enabled on win32k.sys. --- Proof of Concept:...

Microsoft Windows Kernel - win32k.sys Malformed TrueType Program TTF Font Processing Pool-Based Buffer Overflow (MS15-115)

Microsoft Windows Kernel - win32k.sys Malformed TrueType Program TTF Font Processing Pool-Based Buffer Overflow MS15-115 Source: https://code.google.com/p/google-security-research/issues/detail?id=507 We have observed a number of Windows kernel crashes in the win32k.sys driver while processing...

Microsoft Windows Kernel - 'win32k.sys' Malformed TrueType Program TTF Font Processing Pool-Based Buffer Overflow (MS15-115)

Source: https://code.google.com/p/google-security-research/issues/detail?id=507 We have observed a number of Windows kernel crashes in the win32k.sys driver while processing corrupted TTF font files. An example of a crash log excerpt generated after triggering the bug is shown below: ---...

Microsoft Windows Kernel - bGetRealizedBrush Use-After-Free (MS15-097)

Microsoft Windows Kernel - bGetRealizedBrush Use-After-Free MS15-097 Source: https://code.google.com/p/google-security-research/issues/detail?id=458 --- The attached testcase crashes Win 7 with Special Pool on win32k while accessing freed memory in bGetRealizedBrush​​. --- Proof of Concept:...