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CVE-2023-29360 is a local privilege escalation vulnerability in the Windows Kernel Streaming Service driver, mskssrv.sys. The flaw is a logic error in the driver's MDL handling path: attacker-controlled IOCTL input can reach code that allocates an MDL and calls MmProbeAndLockPages with AccessMode set to KernelMode instead of UserMode. Because KernelMode suppresses normal validation of user-supplied addresses, the driver can be induced to create and lock MDLs for arbitrary addresses, including kernel-space memory. The vulnerable path is reachable through the driver's streaming control logic, including the PublishTx flow after required rendezvous and stream objects are initialized. By subsequently invoking the corresponding consume path to map the manipulated MDL into user-accessible memory, an attacker can turn the bug into an arbitrary kernel read/write primitive. The vulnerability has been shown to support escalation from a medium-integrity user context to SYSTEM.
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3 valid exploits after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a local privilege escalation exploit targeting Microsoft Windows (CVE-2023-29360). The main exploit logic is implemented in 'client.cpp', which interacts with the Windows kernel streaming (KS) device interface, specifically targeting the device named '\\.\KsecDD'. The exploit works by opening handles to the device, initializing streaming contexts, and ultimately mapping and modifying the current process token in memory to enable all privileges. Once privileges are enabled, the exploit attempts to spawn a SYSTEM shell, granting the attacker full control over the system. The 'Types.h' header provides custom structures and definitions for interacting with system handles and the KS API. The 'compile_c.sh' script is a Bash script for compiling the exploit on a cross-compilation environment targeting Windows. The exploit is operational and provides a working privilege escalation payload, but is not part of a larger framework. The attack vector is local, requiring code execution on the target system. The only fingerprintable endpoint is the device path '\\.\KsecDD'.
This repository is a proof-of-concept (PoC) exploit for CVE-2023-29360, a privilege escalation vulnerability in the Microsoft Streaming Service Proxy driver (MSKSSRV.SYS) on Windows. The repository contains three files: a README.md with credits and a brief description, a Types.h header defining IOCTL codes and data structures, and the main exploit logic in client.cpp. The exploit works by opening handles to the vulnerable device, performing a series of IOCTL calls to manipulate internal driver state, and ultimately mapping the current process token in memory. It then sets all privilege bits in the token to enabled, effectively granting SYSTEM-level privileges to the process. Finally, it spawns a shell with these elevated rights. The attack vector is local, requiring the attacker to execute code on the target system. The only fingerprintable endpoint is the device interface (\\.\KSNAME_Server) used to communicate with the vulnerable driver. The exploit is operational, providing a working privilege escalation payload, but is not part of a larger framework.
This repository contains a functional local privilege escalation exploit for CVE-2023-29360, a vulnerability in the Microsoft Windows mskssrv.sys driver. The exploit is implemented in C++ and is structured into several components: - The 'common' directory contains utility and structure definitions for interacting with Windows internals, such as querying system modules and handles. - The main exploit logic resides in 'mskssrv/poc.cc' and 'mskssrv/poc.h'. The exploit works by opening handles to the vulnerable driver device, crafting and sending IOCTL requests to manipulate kernel memory, and ultimately overwriting the _TOKEN structure of the current process to grant SYSTEM privileges. - After successful privilege escalation, the exploit spawns a new cmd.exe process with SYSTEM rights. The exploit is operational and not just a proof-of-concept, as it includes the full chain from vulnerability trigger to privilege escalation and SYSTEM shell spawn. The main fingerprintable endpoint is the device path for the mskssrv.sys driver, which is hardcoded in the exploit. The attack vector is local, requiring the attacker to execute code on the target system. The repository is well-structured, with clear separation between utility code and exploit logic.
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8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A local privilege escalation vulnerability in Microsoft Windows, allowing attackers to gain elevated privileges on a compromised system.
A separate vulnerability in the same mskssrv.sys driver referenced for comparison/background as an earlier part of the exploit chain series.
A Windows driver privilege escalation vulnerability mentioned only in related content.
A Windows driver privilege escalation vulnerability in mskssrv.sys mentioned only in related article listings.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.