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CVE-2019-5607

Status Candidate

Overview

In FreeBSD 12.0-STABLE before r350222, 12.0-RELEASE before 12.0-RELEASE-p8, 11.3-STABLE before r350223, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, rights transmitted over a domain socket did not properly release a reference on transmission error allowing a malicious user to cause the reference counter to wrap, forcing a free event. This could allow a malicious local user to gain root privileges or escape from a jail.

Related Files

FreeBSD Security Advisory - FreeBSD-SA-19:17.fd
Posted Jul 25, 2019
Authored by Mark Johnston | Site security.freebsd.org

FreeBSD Security Advisory - If a process attempts to transmit rights over a UNIX-domain socket and an error causes the attempt to fail, references acquired on the rights are not released and are leaked. This bug can be used to cause the reference counter to wrap around and free the corresponding file structure. A local user can exploit the bug to gain root privileges or escape from a jail.

tags | advisory, local, root
systems | unix, freebsd, bsd
advisories | CVE-2019-5607
SHA-256 | ed0e020ba12b1dc01aa8d83590ac696a40d1fccad60067e1fb8300dfbb889466
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