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CVE-2022-22715 is an elevation-of-privilege vulnerability in the Windows Named Pipe File System driver, npfs.sys. The flaw is in npfs!NpTranslateContainerLocalAlias, which translates LOCAL-namespaced named-pipe names for AppContainer and restricted processes. Crafted, excessively long pipe names cause integer overflow in a size calculation; if the pipe name begins with a backslash, a subsequent MaximumLength calculation can underflow. The driver consequently allocates an undersized paged-pool buffer and RtlUnicodeStringPrintf performs an out-of-bounds write. The vulnerability was used to escape the Adobe Reader AppContainer sandbox at TianfuCup 2021.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This two-file repository contains a standalone C++ local privilege-escalation exploit for CVE-2022-22715 and a short README. It is not part of an exploit framework. The C++ program is a Windows-native, build-dependent exploit that uses WNF state-name allocation/spraying, LFH/VS heap manipulation, and extensive token-object spraying to create and identify corrupted kernel objects. It contains hard-coded ntoskrnl.exe offsets for process, KTHREAD, token, object-type, pool/heap, and quota-related structures, making it specific to the kernel layout for which it was developed. After obtaining a corrupted object primitive, it locates kernel addresses including the current and SYSTEM EPROCESS structures, modifies the current thread's PreviousMode to enable arbitrary kernel-address access through NtReadVirtualMemory/NtWriteVirtualMemory, and copies the SYSTEM token value into the current process token field. It then restores PreviousMode and invokes `cmd`. The README states execution must begin at LOW INTEGRITY and warns that cleanup repairs overwritten TOKEN objects but does not fully repair the VS pool structure.
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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows Named Pipe File System (npfs.sys) sandbox escape / local privilege escalation vulnerability caused by integer overflow and underflow in NpTranslateContainerLocalAlias when translating LOCAL\ named pipe paths for AppContainer or restricted tokens, leading to out-of-bounds kernel pool write.
Elevation of privilege vulnerability in Windows Named Pipe File System.
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