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Failures in Twitter’s Two-Factor Authentication System

Schneier on Security

Twitter is having intermittent problems with its two-factor authentication system: Not all users are having problems receiving SMS authentication codes, and those who rely on an authenticator app or physical authentication token to secure their Twitter account may not have reason to test the mechanism.

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Authentication bypass CVE-2025-22230 impacts VMware Windows Tools

Security Affairs

Broadcom addressed a high-severity authentication bypass vulnerability, tracked as CVE-2025-22230, in VMware Tools for Windows. Broadcom released security updates to address a high-severity authentication bypass vulnerability, tracked as CVE-2025-22230 (CVSS score 9.8), impacting VMware Tools for Windows.

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The Consumer Authentication Strength Maturity Model (CASMM)

Daniel Miessler

This post is an attempt to create an easy-to-use security model for the average internet user. Basically, how secure is someone’s current behavior with respect to passwords and authentication, and how can they improve? People like moving up rankings, so let’s use that! How to use this model.

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CASMM (The Consumer Authentication Strength Maturity Model)

Daniel Miessler

This post is an attempt to create an easy-to-use security model for the average internet user. Basically, how secure is someone’s current behavior with respect to passwords and authentication, and what can they do to improve? People like moving up rankings, so let’s use that! How to use this model.

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Voter Records, SSN and Commercial Authentication

Adam Shostack

That also would include dates of birth, the last four digits of voters' Social Security numbers. I want to consider only the information security aspects of the letter , which also states that "Please be aware that any documents that are submitted to the full Commission will also be made available to the public."

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Not All MFA is Equal, and the Differences Matter a Lot

Daniel Miessler

People are starting to get the fact that texts (SMS) are a weak form of multi-factor authentication (MFA). In that post we talked about 8 levels of password security, starting from using shared and weak passwords and going all the way up to passwordless. It completely changes how authentication is done.

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Critical GitHub Enterprise Server Authentication Bypass bug. Fix it now!

Security Affairs

GitHub addressed a vulnerability in the GitHub Enterprise Server (GHES) that could allow an attacker to bypass authentication. GitHub has rolled out security fixes to address a critical authentication bypass issue, tracked as CVE-2024-4985 (CVSS score: 10.0), in the GitHub Enterprise Server (GHES).