Security readout for executives and security teams
Plain-English summary
A flaw in Wazuh’s authd/os_auth service in version 3.5.0 can let a remote attacker send crafted input that corrupts memory and disrupts the authentication daemon. The documented impact is denial of service with low availability impact, not data theft or full system compromise.
Executive priority
Treat this as a moderate operational availability risk. Prioritize exposed Wazuh 3.5.0 instances because disruption of the authentication daemon can affect security operations, but current sources do not indicate active exploitation or broader compromise.
Technical view
CVE-2023-7340 is described as a heap-based buffer overflow in Wazuh authd/os_auth. The CVSS v4.0 score is 5.3, network-accessible, low complexity, no privileges required, with low availability impact. The bundle lists CWE-125, while the title and description describe heap-buffer overflow behavior.
Likely exposure
Exposure appears limited to Wazuh 3.5.0 deployments running the authd/os_auth component, especially where that service is reachable over a network. The source bundle marks other versions as unaffected by default.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The described attack requires specially crafted input and can trigger denial of service against the authentication daemon. No source supports remote code execution claims.
Researcher notes
Evidence is sufficient for affected version, component, CVSS, and DoS impact. Fix details are not included in the source bundle, so remediation should be tied to Wazuh’s advisory rather than inferred. Note the inconsistency between heap-overflow wording and listed CWE-125.
Mitigation direction
- Check Wazuh’s vendor advisory for the supported fix or workaround.
- Upgrade affected Wazuh 3.5.0 systems according to vendor guidance.
- Restrict authd/os_auth network access to trusted management or enrollment sources.
- Monitor for authd crashes, restarts, or abnormal authentication daemon behavior.
Validation and detection
- Inventory Wazuh deployments and confirm whether version 3.5.0 is present.
- Determine whether authd/os_auth is enabled and network reachable.
- Review service logs for crashes or malformed authentication activity.
- Compare installed versions and configuration against the Wazuh advisory.
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-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-7340 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
- 5.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L2.11.4VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.3MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Base CVSS 3.1 score
3.5LowVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/wazuh/wazuh/security/advisories/GHSA-grjq-p5fg-m24rCVE reference, VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/heap-buffer-overflow-in-wazuh-authdCVE reference, VulnCheck · third-party-advisory
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.