CVE-2019-9670: Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference

CVE-2019-9670 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-01-10

The mailboxd component in Synacor Zimbra Collaboration Suite (ZCS) contains an XML External Entity (XXE) injection vulnerability. The flaw is specifically present in the Autodiscover/Autodiscover.xml handler, allowing remote attackers to access sensitive information or potentially achieve further compromise.

Technologies: Synacor Zimbra Collaboration Suite (ZCS). Vendors: Synacor.

Quick answers

Is CVE-2019-9670 exploited in the wild?
Yes. CVE-2019-9670 is known to be exploited in the wild, first recorded on 10 January 2022. Treat it as urgent.
How severe is CVE-2019-9670?
Critical severity, with a CVSS score of 9.8, published 10 January 2022.
Which products and versions are affected?
Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10.
Is there a fix for CVE-2019-9670?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2019-9670 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2019-9670?
Check whether you run Synacor Zimbra Collaboration Suite (ZCS). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10

Timeline

  • 2019-03-11: disclosed: Initial CVE assignment/publication date based on CVE ID year and external references.
  • 2022-01-10: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
  • 2022-01-10: advisory: NVD publication date.
  • 2022-01-10: exploited: Confirmed as exploited in the wild by CISA.

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