Medium severity · published Aug 6, 2024
CVE-2023-28806
Signature validation error in DLL allows disabling anti-tampering protection
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering. This issue affects Client Connector on Windows <4.2.0.190.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Client Connector · Zscaler
before 4.2.0.190 · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-28806
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-28806
Vendor Advisory
https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023?applicable_category=windows&applicable_version=4.2.0.190
More from Client Connector
9.8
CVE-2024-23483
Local Privilege Escalation via lack of input validation
9.8
CVE-2024-23459
Multiple Arbitrary Creates/Overwrites by link following
9.8
CVE-2023-28798
Out-of-bounds write to heap in pacparser
9.8
CVE-2024-23480
Insecure MacOS code sign check fallback
9.8
CVE-2023-28805
ZCC on Linux privilege escalation