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TI-2023-13308 Aliases CVE-2023-28798GHSA-wxgw-4g8w-q999

Out-of-bounds write to heap in pacparser

Priority MEDIUM 43CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

An out-of-bounds write to heap in the pacparser library on Zscaler Client Connector on Mac may lead to arbitrary code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00435 37th percentileScored 2026-11-07
Fix Fixed Client Connector (Zscaler): 3.7.0.172

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZscalerClient Connectorbefore 3.7.0.1723.7.0.172Patch availableCNA
  • Client Connector VendorZscaler Affected before 3.7.0.172 Fixed in 3.7.0.172 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:macos:*:*before 3.7VulnerableZscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:macos:*:* Versions before 3.7 Vulnerable ·Zscaler

Remediation

  • Fix · CNA Client Connector (Zscaler) Fixed in 3.7.0.172

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-28798
  2. 2026-10-03 Alias added: GHSA-wxgw-4g8w-q999

References

Advisory 1

  • TI-2020-09334 The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer… CVSS 3.1CRITICAL 9.8
  • TI-2024-15528 Local Privilege Escalation via lack of input validation CVSS 3.1CRITICAL 9.8
  • TI-2024-15526 Insecure MacOS code sign check fallback CVSS 3.1CRITICAL 9.8
  • TI-2024-15505 Multiple Arbitrary Creates/Overwrites by link following CVSS 3.1CRITICAL 9.8
  • TI-2023-13315 ZCC on Linux privilege escalation CVSS 3.1CRITICAL 9.8
  • TI-2023-13314 Linux ZCC allows unsigned updates, allowing elevated Code Execution CVSS 3.1HIGH 8.2
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences