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An elevation of privilege vulnerability exists in rpcss.dll when the RPC service Activation Kernel improperly handles an RPC request. To exploit this vulnerability, a low level authenticated attacker could run a specially crafted application. The security update addresses this vulnerability by correcting how rpcss.dll handles these requests., aka 'Windows RPCSS Elevation of Privilege Vulnerability'.
Source: MITRE View Analysis Description
Source: MITRE
Base Score: 7.8 HIGH Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (V3 legend) Impact Score: 5.9 Exploitability Score: 1.8
Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None Scope (S): Unchanged Confidentiality (C): High Integrity (I): High Availability (A): High
Base Score: 7.2 HIGH Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C) (V2 legend) Impact Subscore: 10.0 Exploitability Subscore: 3.9
Access Vector (AV): Local Access Complexity (AC): Low Authentication (AU): None Confidentiality (C): Complete Integrity (I): Complete Availability (A): Complete Additional Information: Allows unauthorized disclosure of informationAllows unauthorized modificationAllows disruption of service
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Vulnerability Type (View All)
OR *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-264
http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.html No Types Assigned
http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.html Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1089 No Types Assigned
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1089 Patch, Vendor Advisory
http://packetstormsecurity.com/files/153683/Microsoft-Windows-RPCSS-Activation-Kernel-Security-Callback-Privilege-Escalation.html [No Types Assigned]