CVE-2023-21695: Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability

PriorityP356high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

1.05%

60.4th percentile

Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability

Affected

41 ranges· showing 25

Vendor	Product	Version range	Fixed in
microsoft	windows_10	< 10.0.10240.19747	10.0.10240.19747
microsoft	windows_10_1607	< 10.0.14393.5717	10.0.14393.5717
microsoft	windows_10_1809	< 10.0.17763.4010	10.0.17763.4010
microsoft	windows_10_20h2	< 10.0.19042.2604	10.0.19042.2604
microsoft	windows_10_21h2	< 10.0.19044.2604	10.0.19044.2604
microsoft	windows_10_22h2	< 10.0.19045.2604	10.0.19045.2604
microsoft	windows_10_version_1507	>= 10.0.10240.0 < 10.0.10240.19747	10.0.10240.19747
microsoft	windows_10_version_1607	>= 10.0.14393.0 < 10.0.14393.5717	10.0.14393.5717
microsoft	windows_10_version_1809	>= 10.0.0 < 10.0.17763.4010	10.0.17763.4010
microsoft	windows_10_version_1809	>= 10.0.17763.0 < 10.0.17763.4010	10.0.17763.4010
microsoft	windows_10_version_20h2	>= 10.0.0 < 10.0.19042.2604	10.0.19042.2604
microsoft	windows_10_version_21h2	>= 10.0.19043.0 < 10.0.19044.2604	10.0.19044.2604
microsoft	windows_10_version_22h2	>= 10.0.19045.0 < 10.0.19045.2604	10.0.19045.2604
microsoft	windows_11_21h2	< 10.0.22000.1574	10.0.22000.1574
microsoft	windows_11_22h2	< 10.0.22621.1265	10.0.22621.1265
microsoft	windows_11_version_21h2	>= 10.0.0 < 10.0.22621.1574	10.0.22621.1574
microsoft	windows_11_version_22h2	>= 10.0.22621.0 < 10.0.22621.1265	10.0.22621.1265
microsoft	windows_server_2008	—	—
microsoft	windows_server_2008_r2_service_pack_1	>= 6.1.7601.0 < 6.1.7601.26366	6.1.7601.26366
microsoft	windows_server_2008_service_pack_2	>= 6.0.6003.0 < 6.0.6003.21915	6.0.6003.21915
microsoft	windows_server_2012	—	—
microsoft	windows_server_2012	>= 6.2.9200.0 < 6.2.9200.24116	6.2.9200.24116
microsoft	windows_server_2012_r2	>= 6.3.9600.0 < 6.3.9600.20821	6.3.9600.20821
microsoft	windows_server_2016	>= 10.0.14393.0 < 10.0.14393.5717	10.0.14393.5717
microsoft	windows_server_2019	>= 10.0.17763.0 < 10.0.17763.4010	10.0.17763.4010

Detection & IOCsextracted from sources · hover to see the quote

→Attack vector is network-based; monitor for specially crafted malicious PEAP packets sent to a Microsoft PEAP Server from an authenticated attacker ↗
→Scope detection to Windows Protected EAP (PEAP) service/component on affected Windows hosts; attacker must be authenticated, so monitor for anomalous authenticated sessions followed by unusual PEAP traffic ↗

·Customer action is required; patch is available — exploitation is rated 'Less Likely' for the latest software release and has not been publicly disclosed or observed in the wild as of advisory publication ↗
·The vulnerability requires an authenticated attacker, meaning unauthenticated exploitation is not possible; restrict PEAP server exposure to trusted, authenticated network segments ↗

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

vendor_msrc7.5HIGH

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