CWE Code: 787
Vulnerability Type: privilege_escalation
CVSS Score: 4.9
CWE Name:  Out-of-bounds Write
Summary: comodo antivirus versions 11.0.0.6582 and below are vulnerable to denial of service affecting cmdguard.sys via its filter port "cmdserviceport". a low privileged process can crash cmdvirth.exe to decrease the port's connection count followed by process hollowing a cmdvirth.exe instance with malicious code to obtain a handle to "cmdserviceport". once this occurs, a specially crafted message can be sent to "cmdserviceport" using "filtersendmessage" api. this can trigger an out-of-bounds write if lpoutbuffer parameter in filtersendmessage api is near the end of specified buffer bounds. the crash occurs when the driver performs a memset operation which uses a size beyond the size of buffer specified, causing kernel crash.
Access Authentication: NONE
Access Complexity: LOW
Access Vector: LOCAL
Impact (C/I/A): NONE/NONE/COMPLETE
Published Date: 2019-07-17
Last Modified Date: 2019-07-23