{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2022-4149","assignerOrgId":"bf992f6a-e49d-4e94-9479-c4cff32c62bc","state":"PUBLISHED","assignerShortName":"Netskope","dateReserved":"2022-11-28T12:19:11.243Z","datePublished":"2023-06-15T06:44:25.434Z","dateUpdated":"2024-12-12T17:05:07.261Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["Windows"],"product":"Netskope Client","vendor":"Netskope","versions":[{"status":"affected","version":"95, 0"}]}],"credits":[{"lang":"en","type":"finder","user":"00000000-0000-4000-9000-000000000000","value":"Netskope credits Dawson Medin from Mandiant for reporting this flaw."}],"datePublic":"2023-06-15T06:24:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The Netskope client service (prior to R96) on Windows runs as NT AUTHORITY\\SYSTEM which writes log files to a writable directory (C:\\Users\\Public\\netSkope) for a standard user. The files are created and written with a SYSTEM account except one file (logplaceholder) which inherits permission giving all users full access control list. Netskope client restricts access to this file by allowing only read permissions as a standard user. Whenever the Netskope client service restarts, it deletes the logplaceholder and recreates, creating a race condition, which can be exploited by a malicious local user to create the file and set ACL permissions on the file. Once the file is created by a malicious user with proper ACL permissions, all files within C:\\Users\\Public\\netSkope\\ becomes modifiable by the unprivileged user. By using Windows pseudo-symlink, these files can be pointed to other places in the system and thus malicious users will be able to elevate privileges.
"}],"value":"The Netskope client service (prior to R96) on Windows runs as NT AUTHORITY\\SYSTEM which writes log files to a writable directory (C:\\Users\\Public\\netSkope) for a standard user. The files are created and written with a SYSTEM account except one file (logplaceholder) which inherits permission giving all users full access control list. Netskope client restricts access to this file by allowing only read permissions as a standard user. Whenever the Netskope client service restarts, it deletes the logplaceholder and recreates, creating a race condition, which can be exploited by a malicious local user to create the file and set ACL permissions on the file. Once the file is created by a malicious user with proper ACL permissions, all files within C:\\Users\\Public\\netSkope\\ becomes modifiable by the unprivileged user. By using Windows pseudo-symlink, these files can be pointed to other places in the system and thus malicious users will be able to elevate privileges.\n"}],"exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

Netskope is not aware of any public disclosure and exploitation of this vulnerability at the time of publication. 

"}],"value":"Netskope is not aware of any public disclosure and exploitation of this vulnerability at the time of publication. \n\n"}],"impacts":[{"capecId":"CAPEC-233","descriptions":[{"lang":"en","value":"CAPEC-233 Privilege Escalation"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-367","description":"CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"bf992f6a-e49d-4e94-9479-c4cff32c62bc","shortName":"Netskope","dateUpdated":"2023-06-15T06:44:27.310Z"},"references":[{"url":"https://www.netskope.com/company/security-compliance-and-assurance/security-advisories-and-disclosures/netskope-security-advisory-nskpsa-2023-002"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Netskope has patched the vulnerability and released a binary with a fix. Customers are recommended to upgrade their Netskope clients to v100 or later. Netskope download Instructions – Download Netskope Client and Scripts – Netskope Support
"}],"value":"Netskope has patched the vulnerability and released a binary with a fix. Customers are recommended to upgrade their Netskope clients to v100 or later. Netskope download Instructions – Download Netskope Client and Scripts – Netskope Support https://support.netskope.com/s/article/Download-Netskope-Client-and-Scripts \n"}],"source":{"advisory":"NSKPSA-2023-002","defect":["NSKPSA-2023-002"],"discovery":"EXTERNAL"},"title":"Local privilege escalation using log file","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Netskope recommends using hardening guidelines listed here - – https://docs.netskope.com/en/netskope-client-hardening.html 
"}],"value":"Netskope recommends using hardening guidelines listed here - – https://docs.netskope.com/en/netskope-client-hardening.html https://docs.netskope.com/en/netskope-client-hardening.html  \n"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T01:27:54.588Z"},"title":"CVE Program Container","references":[{"url":"https://www.netskope.com/company/security-compliance-and-assurance/security-advisories-and-disclosures/netskope-security-advisory-nskpsa-2023-002","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-12-12T17:04:43.872061Z","id":"CVE-2022-4149","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-12-12T17:05:07.261Z"}}]}}