{"vuid":"VU#240785","idnumber":"240785","name":"Atlassian Bitbucket on Windows is vulnerable to privilege escalation due to weak ACLs","keywords":null,"overview":"### Overview\r\nAtlassian Bitbucket on Windows fails to properly set ACLs, which can allow an unprivileged Windows user to run arbitrary code with SYSTEM privileges.\r\n\r\n### Description\r\n\r\nThe Atlassian Bitbucket Windows installer fails to set a secure access-control list (ACL) on the default installation directory, such as `C:\\Atlassian\\Bitbucket\\`. By default, unprivileged users can create files in this directory structure, which creates a privilege-escalation vulnerability.\r\n\r\n### Impact\r\nBy placing a specially-crafted DLL file in the Bitbucket installation directory, an unprivileged user may be able to execute arbitrary code with SYSTEM privileges on a Windows system with the vulnerable Bitbucket software installed. See [DLL Search Order Hijacking](https://attack.mitre.org/techniques/T1574/001/) for more details.\r\n\r\n### Solution\r\n#### Apply an update\r\nThis issue has been addressed in the Bitbucket Windows installer for versions 7.10.1, 7.6.4, and 6.10.9. Please see https://jira.atlassian.com/browse/BSERV-12753 for more details.\r\n\r\n\r\n### Acknowledgements\r\nThis vulnerability was reported by Will Dormann of the CERT/CC.\r\n\r\nThis document was written by Will Dormann.","clean_desc":null,"impact":null,"resolution":null,"workarounds":null,"sysaffected":null,"thanks":null,"author":null,"public":["https://jira.atlassian.com/browse/BSERV-12753"],"cveids":["CVE-2020-36233"],"certadvisory":null,"uscerttechnicalalert":null,"datecreated":"2021-02-18T18:01:37.659870Z","publicdate":"2021-02-18T18:01:37.465772Z","datefirstpublished":"2021-02-18T18:01:37.684243Z","dateupdated":"2021-02-18T18:01:37.465763Z","revision":1,"vrda_d1_directreport":null,"vrda_d1_population":null,"vrda_d1_impact":null,"cam_widelyknown":null,"cam_exploitation":null,"cam_internetinfrastructure":null,"cam_population":null,"cam_impact":null,"cam_easeofexploitation":null,"cam_attackeraccessrequired":null,"cam_scorecurrent":null,"cam_scorecurrentwidelyknown":null,"cam_scorecurrentwidelyknownexploited":null,"ipprotocol":null,"cvss_accessvector":null,"cvss_accesscomplexity":null,"cvss_authentication":null,"cvss_confidentialityimpact":null,"cvss_integrityimpact":null,"cvss_availabilityimpact":null,"cvss_exploitablity":null,"cvss_remediationlevel":null,"cvss_reportconfidence":null,"cvss_collateraldamagepotential":null,"cvss_targetdistribution":null,"cvss_securityrequirementscr":null,"cvss_securityrequirementsir":null,"cvss_securityrequirementsar":null,"cvss_basescore":null,"cvss_basevector":null,"cvss_temporalscore":null,"cvss_environmentalscore":null,"cvss_environmentalvector":null,"metric":null,"vulnote":41}