Heap Based Buffer Overflow in Library

published 2023-10-23 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32428

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits: 0; none known

Buffer overflow vulnerability in the signelf library used by Zscaler Client Connector on Linux allows Code Injection. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Patch / fix

fixed in 1

Zscaler Client Connector 1.3.1.6

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 20 mo ago (2025-02-26)

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Zscaler Client Connector

Classification

Weakness

CWE-94 Improper Control of Generation of Code
CWE-787 Out-of-bounds Write

References

help.zscaler.com /client-connector/client-connector-app-release-summary-2022?applicable_category=Linux&applicable_version=1.3.1
release-notes

Sources

CVE List CVE-2023-28793
NVD CVE-2023-28793

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary