CVE-2023-20126
Published: 04 May 2023
Summary
CVE-2023-20126 is a critical-severity Missing Authentication for Critical Function (CWE-306) vulnerability in Cisco Spa112 Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 1.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A vulnerability in the web-based management interface of Cisco SPA112 2-Port Phone Adapters stems from a missing authentication process in the firmware upgrade function. The flaw, tracked as CVE-2023-20126 and assigned CWE-306, permits unauthenticated remote code execution and carries a CVSS 3.1 score of 9.8.
An unauthenticated remote attacker can exploit the issue by supplying a crafted firmware image through the management interface, resulting in arbitrary code execution with full privileges on the affected device. No user interaction or credentials are required for successful exploitation.
The Cisco Security Advisory states that no firmware updates have been released to address the vulnerability and directs administrators to the published advisory for additional details. The EPSS score has reached a peak of 0.7391 with a current value of 0.6993.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-24305
Vulnerability details
A vulnerability in the web-based management interface of Cisco SPA112 2-Port Phone Adapters could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to a missing authentication process within the firmware upgrade…
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function. An attacker could exploit this vulnerability by upgrading an affected device to a crafted version of firmware. A successful exploit could allow the attacker to execute arbitrary code on the affected device with full privileges. Cisco has not released firmware updates to address this vulnerability.
- 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.
Requires established identification and authentication to unlock, mitigating missing authentication for continued system access.
Requiring identification and rationale for actions allowed without authentication ensures critical functions are not left unprotected by forcing review of authentication requirements.
Authorizing mobile device connections to organizational systems ensures authentication is performed for this critical access function.
Guarantees critical functions are protected by mandatory invocation of the access control mechanism.
Auditing sessions makes it possible to detect access to critical functions without required authentication.
The assessment process confirms authentication is present and effective for critical functions, preventing exploitation from missing authentication.
Certification assesses that critical functions have required authentication controls in place.
Disabling non-essential functions and services eliminates the need to secure them, reducing exposure from missing authentication on unnecessary components.