1. Mass Exploitation of (Un)authenticated Zimbra RCE: CVE-2022-27925

    [Note: Volexity has reported all findings in this post to Zimbra. Where an existing contact was known, Volexity has notified local CERTs of compromised Zimbra instances in their constituency. The newest versions of Zimbra are patched for both the RCE vulnerability and authentication bypass vulnerabilities described in this blog.] In July and early August 2022, Volexity worked on multiple incidents where the victim organization experienced serious breaches to their Zimbra Collaboration Suite (ZCS) email servers. Volexity’s investigations uncovered evidence indicating the likely cause of these breaches was exploitation of CVE-2022-27925, a remote-code-execution (RCE) vulnerability in ZCS. This initial CVE was patched by Zimbra in March 2022 in 8.8.15P31 and 9.0.0P24. Figure 1. Description of CVE-2022-27925 from the NIST website Initial research into the vulnerability did not uncover any public exploit code, but since a patch had been available for several months, it was reasonable that exploit code could have been […]

  2. Active Exploitation of Newly Patched ColdFusion Vulnerability (CVE-2018-15961)

    If your organization is running an Internet-facing version of ColdFusion, you may want to take a close look at your server. Volexity recently observed active exploitation of a newly patched vulnerability in Adobe ColdFusion, for which no public details or proof-of-concept code exists. In the attack detected by Volexity, a suspected Chinese APT group was able to compromise a vulnerable ColdFusion server by directly uploading a China Chopper webshell. The target server was missing a single update from Adobe that had been released just two weeks earlier. On September 11, 2018, Adobe issued security bulletin APSB18-33, which fixed a variety of issues to include an unauthenticated file upload vulnerability. Per the advisory, this vulnerability was assigned CVE-2018-15961 and affects ColdFusion 11 (Update 14 and earlier), ColdFusion 2016 (Update 6 and earlier), and ColdFusion 2018 (July 12 release). This effectively includes all versions of ColdFusion released over the last four years. […]