{"uuid": "4f1e2b3a-b4ab-4d0c-9930-a222ec43b77f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-34527", "type": "seen", "source": "https://t.me/hacking_Attack/43504", "content": "des the RPC stubs required to access the server.Vulnerability SummaryVulnerability FlowTo understand the vulnerability flow, lets understand working of RpcAddPrinterDriver first. The steps are as follows:Security Check: When the client will call this function, system checks if the client has \u201cSeLoadDriverPrivilege\u201d which is by default given to administrators group.Bypassing Security Check: AFWU mentioned in his original writeup that a user can supply the following parameters in the spooler service:\u200b pDataFile =A.dllSpooler service will copy A,B,C DLL files in C:\\Windows\\System32\\spool\\drivers\\x64\\3\\newand then load them to C:\\Windows\\System32\\spool\\drivers\\x64\\3He further elaborates that for pDataFile and pDriverPath there is a check in Windows that these DLLs can\u2019t be a UNC path. But pConfigFile can be a UNC path and therefore an attacker can do the following:\u200b pDataFile =A.dllWhich in theory would force Windows to load evil.dll from an attacker\u2019s share.C:\\Windows\\System32\\spool\\drivers\\x64\\3\\evil.dllC:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\1\\C:\\Windows\\System32\\spool\\drivers\\x64\\3\\old\\1\\evil.dll pathMachine IPsThroughout the demo, following IP addresses have been taken:Attacker IP: 192.168.1.2This is the method pertaining to CVE-2021-34527 (remote code executio[...]\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-01T20:01:54.041651Z"}