Title: Symantec Norton AntiVirus Device Driver Memory Overwrite Vulnerability
Severity: MODERATE
Description:
It has been reported that a memory corruption vulnerability affects the Symantec Norton AntiVirus Device Driver, "NAVAP.SYS". According to the report, one of the device control operation handlers attempts to write data to an address offset from a pointer parameter passed to DeviceIoControl(). There is no validation on the parameter supplied or the address written to.
The vulnerability is reportedly present in the driver subroutine for handling control code "0x222a87". This control operation can be invoked by unprivileged userland processes through DeviceIoControl(). One of the arguments passed to this control operation is later used as the target of a memory write without any validation. As the device driver code runs in kernel mode, a write to an invalid address (not page-mapped) will result in a complete system crash. It may also be possible, though likely difficult, for a malicious userland program to hijack control of the kernel to escalate privileges.
In the report, NAV 2002 was listed as vulnerable. It is not currently known if NAV 2003 is affected.
Proof-of-concept code has been developed.
Affected Products:
- Symantec AntiVirus Corporate Edition 8.0.01
- Symantec AntiVirus Corporate Edition 8.1.0
- Symantec Norton AntiVirus 2002 0.0.0
- Symantec Norton Antivirus 2003 0.0.0
References:
- Lord Yup: Win32 Device Drivers Communication Vulnerabilities
- Symantec: Win32 Device Drivers Communication Vulnerabilities
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