Security News > 2023 > November > Google: Hackers exploited Zimbra zero-day in attacks on govt orgs

Google's Threat Analysis Group has discovered that threat actors exploited a zero-day vulnerability in Zimbra Collaboration email server to steal sensitive data from government systems in multiple countries.
According to Google's threat analysts, the threat actors exploited the vulnerability on government systems in Greece, Moldova, Tunisia, Vietnam, and Pakistan to steal email data, user credentials, and authentication tokens, perform email forwarding, and lead victims to phishing pages.
Google observed four distinct threat actors using the vulnerability that was unknown at the time of exploitation in late June 2023 against a government organization in Greece.
Zimbra pushed an emergency hotfix on GitHub after Google analysts alerted the company of the observed compromises.
On July 13, Zimbra published a security advisory recommending mitigations for the vulnerability but there was no note about hackers actively exploiting the bug.
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