Threat actors use Zimbra exploits to target organizations in Ukraine

Threat actors are targeting Ukrainian government organizations with exploits for XSS vulnerabilities in Zimbra Collaboration Suite (CVE-2018-6882).

Ukraine’s CERT (CERT-UA) warns of threat actors that are targeting government organizations with exploits for XSS vulnerabilities in Zimbra Collaboration Suite (CVE-2018-6882).

“Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.” reads the description of this issue published by the NIST NVD.

The CERT-UA uncovered a cyber espionage campaign conducted by nation-state actors, attackers used phishing messages with the subject “Volodymyr Zelenskyy presented the Golden Star Orders to serve the Armed Forces of Ukraine and members of the families of the fallen Heroes of Ukraine “.

The phishing message uses attached images allegedly from an event where President V. Zelensky awarded members of the Armed Forces.

These images contain a content-location header that loads and execute a JavaScript code. This second script adds to the configuration of the email account of the victim, the attacker’s email address, in this way any message sent to the victim will be forwarded to the attacker’s account

CERT-UA urges organizations in Ukraine using Zimbra to update to the latest versions.

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Pierluigi Paganini

(SecurityAffairs – hacking, Ukraine)

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Pierluigi Paganini

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.