Cutting Through the Noise: Security Insights by Zach Hanley

On August 25, 2021, Atlassian released a security advisory for CVE-2021-26084, an OGNL injection vulnerability found within a component of Confluence Server and Data Center. This critical vulnerability allows an unauthenticated attacker to execute arbitrary commands on the server. A few days later, on August 31, security researchers @iamnoob and @rootxharsh quickly developed a working proof of concept given the vulnerability…

In August, Orange Tsai released details and also spoke at BlackHat and DEFCON detailing his security research into Microsoft Exchange. His latest blog post details a series of vulnerabilities dubbed ProxyShell. ProxyShell is a chain of three vulnerabilities: CVE-2021-34473 - Pre-auth Path Confusion leads to ACL Bypass CVE-2021-34523 - Elevation of Privilege on Exchange PowerShell Backend CVE-2021-31207 - Post-auth Arbitrary-File-Write leads to…

Write the file supplied in the --file argument to the location specified in the --path argument. The file will be written in the context of the vsphere-ui user. If the target is vulnerable, but the exploit fails, it is likely that the vsphere-ui user does not have permissions to write to the specified path.