CVE-2016-9924

Zimbra Collaboration Suite (ZCS) before 8.7.4 allows remote attackers to conduct XML External Entity (XXE) attacks

published March 29, 2017

CVSS
โ€”
EPSS
3%
Percentile
86.5
In the wild
Unconfirmed
What it is

๐Ÿšจ An XML External Entity (XXE) vulnerability in Zimbra Collaboration Suite could let attackers sneak in and access sensitive files without breaking a sweat! ๐Ÿ” Think of it like a hotel concierge who blindly hands out guest keys without checking whoโ€™s asking โ€” the attacker can simply request a room and get inside! ๐Ÿจ This sneaky flaw allows attackers to manipulate XML inputs to access unauthorized files, potentially exposing sensitive data. Although it hasn't been exploited widely yet, the risk is there for those still using the vulnerable versions of the software.

Put simply

Think of it like a hotel concierge who blindly hands out guest keys without checking whoโ€™s asking โ€” the attacker can simply request a room and get inside! ๐Ÿจ The vulnerability arises because Zimbra's handling of XML files doesn't adequately protect against external entities, allowing attackers to read files on the server by sending specially crafted XML data.

What to do

This sneaky flaw allows attackers to manipulate XML inputs to access unauthorized files, potentially exposing sensitive data. Although it hasn't been exploited widely yet, the risk is there for those still using the vulnerable versions of the software. To protect yourself, upgrade to Zimbra Collaboration Suite version 8.7.4 or later. Additionally, you should review your XML handling practices to ensure they block external entity processing. You've got this! Taking these steps will help keep your Zimbra environment secure. ๐ŸŒŸ

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02850 ยท 86.5th percentile
Published
2017-03-29T14:00Z
EPSS history
Timeline
  • 29 MAR 14:00Z
    Zimbra Collaboration Suite (ZCS) before 8.7.4 allows remote attackers to conduct XML External Entity (XXE) attacks
    cvelistv5