What’s Vulnerable › Vulnerabilities

CVE-2023-28798: Out-of-bounds write to heap in pacparser

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-02 · updated 2026-06-17
• Weakness: CWE-122

Description

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

Affected products

• Zscaler Client Connector: before 3.7 — fixed in 3.7

How to fix

Upgrade to a fixed version: Zscaler Client Connector 3.7. Check the vendor advisory for mitigations.

References

• https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=macOS&applicable_version=3.7&deployment_date=2022-08-19&id=1414851
• https://help.zscaler.com/client-connector/client-connector-app-release-summary-2022?applicable_category=macOS&applicable_version=3.7&deployment_date=2022-08-19&id=1414851

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