Security readout for executives and security teams
Plain-English summary
CVE-2023-45742 is a high-impact flaw in Realtek router SDK code used by at least one confirmed LevelOne router model. A logged-in attacker with high privileges can send crafted HTTP requests to the device web service and potentially execute arbitrary code, risking full device compromise.
Executive priority
Prioritize remediation for affected routers in production, remote offices, or externally reachable management segments. The attacker needs high privileges, but successful exploitation could give full control of the device and undermine network trust boundaries.
Technical view
The flaw is an integer overflow in the boa updateConfigIntoFlash functionality in Realtek rtl819x Jungle SDK v3.4.11. The CVSS vector is network-accessible, low complexity, high privileges required, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Confirmed exposure is Realtek rtl819x Jungle SDK v3.4.11 and LevelOne WBR-6013 firmware RER4_A_v3411b_2T2R_LEV_09_170623. Risk is highest where device administration interfaces are reachable over untrusted networks or privileged credentials are compromised.
Exploitation context
The sources describe arbitrary code execution via a specially crafted series of HTTP requests. The CVE is not listed as KEV in the provided bundle, and the sources provided do not state active exploitation in the wild.
Researcher notes
Evidence is specific to the Realtek SDK function and the listed LevelOne firmware. The bundle does not name a patch, broader downstream product list, or observed exploitation. Treat downstream exposure as an inventory question, not an assumed universal Realtek device issue.
Mitigation direction
- Check Realtek and LevelOne guidance for fixed firmware or supported mitigation.
- Restrict router administration interfaces to trusted management networks only.
- Disable internet-facing access to boa-based web administration where possible.
- Review and harden privileged administrator credentials for affected devices.
- Replace unsupported affected devices if no vendor fix is available.
Validation and detection
- Inventory LevelOne WBR-6013 devices and confirm exact firmware versions.
- Identify devices or products using Realtek rtl819x Jungle SDK v3.4.11.
- Verify management interfaces are not exposed to untrusted networks.
- Review device logs for unusual authenticated configuration update activity.
- Track vendor advisories for patch availability or compensating controls.
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-190: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-45742 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.