Attack Blogs

Understanding Log4Shell: the Apache log4j2 Remote Code Execution Vulnerability (CVE-2021-44228)

We wanted to do something a little bit different with this post. Our vulnerability disclosures, exploit proof-of-concepts, and attack analysis blog posts have been awesome, but they have been catering to an offensive security audience.

Overview A common attack path that Horizon3 has identified across many of its customers is abusing access to the VMware vCenter Identity Provider (IdP) certificate. Security Assertion Markup Language (SAML) has proved to be a hotbed of vulnerabilities within the last year, as well as a target of many cybercrime syndicates and APTs. In the…

Overview On September 14, multiple vulnerabilities were discovered by researchers at Wiz.io. The most critical of them being CVE-2021-38647, now dubbed OMIGOD, which effects the Open Management Infrastructure (OMI) agent in versions 1.6.8.0 and below. Azure customers effected by this vulnerability are still vulnerable and must take manual action to ensure the OMI agent is updated.…

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…

The engineering team has been working tirelessly to improve the "what to wow" user experience, add more attack content, add indicators of best practices and improve analytical insights. Improving our "what to wow" user experience – In security, there are two types of findings: critical problems that require you skip lunch, or cancel plans with…

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.