Zimbra urges admins to manually fix zero-day exploited in attacks

Zimbra urged admins today to manually fix a zero-day vulnerability actively exploited to target and compromise Zimbra Collaboration Suite email servers.

“A security vulnerability in Zimbra Collaboration Suite Version 8.8.15 that could potentially impact the confidentiality and integrity of your data has surfaced. [.] The fix is planned to be delivered in the July patch release,” the company warned on Thursday via an advisory that doesn’t inform customers the bug is also being abused in the wild.

While Zimbra has not yet provided security patches to address this actively exploited zero-day, it did provide a fix that admins can apply manually to remove the attack vector.

The fix can be applied without downtime because a Zimbra service restart is not required to apply the mitigation.

As early as June 2022, Zimbra auth bypass and remote code execution bugs were exploited to breach over 1,000 servers.

Microsoft: Unpatched Office zero-day exploited in NATO summit attacks.

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