All Posts

3 posts

OpenBSD Local Privilege Escalation Vulnerability (CVE-2019-19726)

Qualys Research Labs discovered a local privilege escalation vulnerability in OpenBSD’s dynamic loader. The vulnerability could allow local users or malicious software to gain full root privileges. OpenBSD developers have confirmed the vulnerability and released security patches in less than 3 hours.

Qualys Research Labs also provided proof-of-concept exploits in the security advisory.

Continue reading …

OpenBSD Multiple Authentication Vulnerabilities

Multiple authentication vulnerabilities in OpenBSD have been disclosed by Qualys Research Labs. The vulnerabilities are assigned following CVEs: CVE-2019-19522, CVE-2019-19521, CVE-2019-19520, CVE-2019-19519. OpenBSD developers have confirmed the vulnerabilities and also provided a quick response with patches published in less than 40 hours.

Continue reading …

The Stack Clash

What is the Stack Clash?

The Stack Clash is a vulnerability in the memory management of several operating systems. It affects Linux, OpenBSD, NetBSD, FreeBSD and Solaris, on i386 and amd64.  It can be exploited by attackers to corrupt memory and execute arbitrary code.

Qualys researchers discovered this vulnerability and developed seven exploits and seven proofs of concept for this weakness, then worked closely with vendors to develop patches. As a result we are releasing this advisory today as a coordinated effort, and patches for all distributions are available June 19, 2017. We strongly recommend that users place a high priority on patching these vulnerabilities immediately.

Continue reading …