Security readout for executives and security teams
Plain-English summary
This vulnerability can crash Zabbix’s embedded JavaScript engine when too many values are pushed onto Duktape’s value stack. The main business risk is monitoring disruption, not data theft. Public evidence provided does not show active exploitation or a named vendor fix.
Executive priority
Treat this as a moderate operational resilience issue. It can affect monitoring availability, which may reduce incident visibility, but the provided evidence does not support emergency response for active exploitation.
Technical view
CVE-2023-29458 is a Duktape 2.6 valstack handling bug reported against Zabbix. The CVSS vector indicates network reachability, low privileges, high attack complexity, no user interaction, no confidentiality impact, low integrity impact, and high availability impact. The source bundle maps affected Zabbix versions to 5.0.0, 6.0.0, 6.4.0, and 7.0.0alpha1.
Likely exposure
Exposure is most likely in Zabbix environments running the listed affected versions and using functionality that invokes the bundled Duktape JavaScript engine. The source bundle does not describe exact feature paths, package builds, or configuration prerequisites.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source in the bundle states active exploitation. CVSS suggests exploitation requires authenticated low-privilege access and high complexity, with availability as the primary impact.
Researcher notes
Evidence is incomplete on the precise vulnerable call path and fixed versions. The CVSS vector and affected list come from the CVE bundle; mitigation should be anchored to Zabbix and Debian advisories rather than assumed Duktape-only replacement.
Mitigation direction
- Inventory Zabbix versions against the affected releases listed in the CVE bundle.
- Review Zabbix ZBX-22989 and Debian LTS guidance for vendor-supported fixes.
- Prioritize upgrades or package updates once confirmed by vendor advisories.
- Restrict low-privilege access to Zabbix features that execute JavaScript where operationally feasible.
- Monitor Zabbix service crashes and availability alerts for unusual patterns.
Validation and detection
- Confirm whether deployed Zabbix versions match 5.0.0, 6.0.0, 6.4.0, or 7.0.0alpha1.
- Check installed Duktape or bundled JavaScript engine versions where package data exposes them.
- Review Zabbix logs for crashes correlated with JavaScript processing activity.
- Verify whether vendor advisories identify a fixed Zabbix or Debian package version.
- Document compensating controls around authenticated Zabbix access and JavaScript-enabled workflows.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-129: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-29458 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H1.64.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.zabbix.com/browse/ZBX-22989CVE reference
- https://lists.debian.org/debian-lts-announce/2024/10/msg00000.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Validation of Array Index
Improper Validation of Array Index represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.