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Severe Auth Bypass and Priv-Esc Vulnerabilities Disclosed in OpenBSD

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OpenBSD, an open-source operating system built with security in mind, has been found vulnerable to four new high-severity security vulnerabilities, one of which is an old-school type authentication bypass vulnerability in BSD Auth framework.

The other three vulnerabilities are privilege escalation issues that could allow local users or malicious software to gain privileges of an auth group, root, as well as of other users, respectively.

The vulnerabilities were discovered and reported by Qualys Research Labs earlier this week, in response to which OpenBSD developers released security patches for OpenBSD 6.5 and OpenBSD 6.6 just yesterday—that's in less than 40 hours.


TL;DR:

- OpenBSD Authentication Bypass (CVE-2019-19521)

- OpenBSD Local Privilege Escalation Flaws (CVE-2019-19520, CVE-2019-19522, CVE-2019-19519)

 

Qualys PoC: https://www.qualys.com/2019/12/04/cve-2019-19521/authentication-vulnerabilities-openbsd.txt

Source: https://thehackernews.com/2019/12/openbsd-authentication-vulnerability.html

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