MediumPublic exploit

Arbitrary Memory Overwrite in Novell Client NWFS.SYS

IdentifiersCVE-2008-3158CWE-123

An unspecified vulnerability in the NWFS.SYS driver of Novell Client for Windows 4.91 SP4 may allow attackers to overwrite arbitrary memory locations, likely via crafted IOCTL requests. The exact details of the vulnerable function and exploitation method are not disclosed.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation could allow an attacker to execute arbitrary code in kernel mode, potentially leading to privilege escalation or system compromise. The full impact is unknown due to lack of detailed information.

Mitigation

If you can’t patch tonight, do this now.

Restrict access to the affected system to trusted users only. Limit the ability to send IOCTL requests to NWFS.SYS to privileged processes. Monitor for suspicious activity targeting the NWFS.SYS driver.

Remediation

Patch, then assume compromise.

Apply any patches or updates provided by Novell for the Novell Client for Windows 4.91 SP4. If no patch is available, consider upgrading to a later version if possible.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.

VALID 1 / 1 TOTALView more in app

novell_client_nwfs.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit module that exploits a local privilege escalation vulnerability (CVE-2008-3158) in the Novell Client 4.91 SP4 (nwfs.sys 4.91.4.7) on Windows XP SP3. The exploit abuses an IOCTL handler in the nwfs.sys driver that allows an attacker to write a fixed value to an arbitrary kernel address. By overwriting an entry in the HalDispatchTable, the attacker can redirect execution to custom shellcode when NtQueryIntervalProfile is called. The module uses Meterpreter's Railgun to interact with Windows APIs and device drivers, and injects a customizable payload (typically a Meterpreter shell) to gain SYSTEM privileges. The main fingerprintable endpoints are the device file \\.\Nwfs and the HalDispatchTable in kernel memory. The exploit is operational and requires local access to the target system with the vulnerable driver installed.

Disclosed Jun 26, 2008rubylocal

EXPOSURE SURFACE

Affected products & vendors

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VendorProductType

NovellNovell Client For Windowsapplication

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ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

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Social activity