CVE-2022-34047
Published: 20 July 2022
Summary
CVE-2022-34047 is a high-severity Exposure of Resource to Wrong Sphere (CWE-668) vulnerability in Wavlink Wl-Wn530Hg4 Firmware. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 1.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-34047 is an access control vulnerability in the Wavlink WN530HG4 router running firmware version M30HG4.V5030.191116. The flaw resides in the device's web interface and permits unauthenticated retrieval of sensitive configuration data by requesting the URL http://IP_ADDRESS/set_safety.shtml and inspecting the page source for the variable var syspasswd.
An attacker with network reachability to the device can exploit the issue without credentials or user interaction, directly obtaining administrative usernames and passwords stored in the exposed JavaScript. This results in full compromise of the router's management account and potential takeover of connected network resources.
Public references on PacketStorm Security document the disclosure and provide a proof-of-concept, while the associated EPSS score has remained steady at 0.5918 with no indicated rise after publication. No vendor advisory or patch information appears in the supplied references.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-37077
Vulnerability details
An access control issue in Wavlink WN530HG4 M30HG4.V5030.191116 allows attackers to obtain usernames and passwords via view-source:http://IP_ADDRESS/set_safety.shtml?r=52300 and searching for [var syspasswd].
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Controls whether organization resources are exposed to external system spheres by permitting or prohibiting their use.
The control ensures information is not released into a security sphere where the recipient lacks matching access authorizations.
The control ensures information resources are not exposed to the incorrect (public) sphere through review and authorization.
Protects against data mining that would expose resources to unauthorized spheres by enforcing detection and controls.
Restricts information flows to ensure resources are not exposed to incorrect or unauthorized spheres.
Controlling internal connections prevents exposure of resources to unintended internal spheres.
Knowing exact processing and storage locations helps avoid exposure of resources to incorrect spheres.
The control prevents exposure of the media resource to the wrong security sphere.