Medium severity · published Oct 23, 2023
CVE-2023-28803
Traffic being bypassed by ZCC by configuring synthetic IP range as local network
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows, allowing a functionality bypass. This issue affects Client Connector: before 3.9.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Client Connector · Zscaler
before 3.9 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-28803
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-28803
Release Notes
https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023
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