CVE-2023-29334
Published: 28 April 2023
Summary
CVE-2023-29334 is a medium-severity Authentication Bypass by Spoofing (CWE-290) vulnerability in Microsoft Edge Chromium. Its CVSS base score is 4.3 (Medium).
Operationally, ranked in the top 24.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft Edge (Chromium-based) contains a spoofing vulnerability tracked as CVE-2023-29334. The flaw received a CVSS 4.3 rating reflecting network attack vector, low complexity, no required privileges, and required user interaction, with limited integrity impact and no confidentiality or availability effects. It is also associated with CWE-290, authentication bypass by spoofing.
An unauthenticated remote attacker can exploit the issue by serving crafted content that triggers the spoofing condition when a user interacts with Microsoft Edge. Successful exploitation allows the attacker to alter perceived identity or origin information, achieving limited integrity changes without further system compromise.
The EPSS score started low but rose materially to a peak of 0.0762 on 2025-01-22 before receding to the current value of 0.0085, indicating emerging exploitation interest after disclosure. Official advisories and patches are documented at the Microsoft Security Response Center and the Gentoo GLSA 202309-17 reference.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-32908
Vulnerability details
Microsoft Edge (Chromium-based) Spoofing 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.
Reveals spoofed logon attempts through unexpected previous logon timestamps upon legitimate login.
Training specifically addresses recognizing spoofed communications and phishing that enable authentication bypass.
Requiring verifiable identity evidence at appropriate assurance levels makes it substantially harder for attackers to successfully spoof or impersonate users to obtain accounts.
Unique device authentication makes successful spoofing of device identity substantially more difficult to achieve.
Unique identification of non-organizational users reduces the feasibility of authentication bypass by spoofing.
Unique identification and authentication of services before communications makes spoofing of service identities substantially harder.
Isolated trusted path ensures the user interacts only with genuine system components, preventing spoofing of authentication interfaces or prompts.
Directly counters DNS response spoofing by requiring cryptographic origin authentication artifacts from the authoritative source.