Vulnerability Details CVE-2019-5606
In FreeBSD 12.0-STABLE before r349805, 12.0-RELEASE before 12.0-RELEASE-p8, 11.3-STABLE before r349806, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, code which handles close of a descriptor created by posix_openpt fails to undo a signal configuration. This causes an incorrect signal to be raised leading to a write after free of kernel memory allowing a malicious user to gain root privileges or escape a jail.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 22.5%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
References
- http://packetstormsecurity.com/files/153748/FreeBSD-Security-Advisory-FreeBSD-SA-19-13.pts.html
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:13.pts.asc
- https://security.netapp.com/advisory/ntap-20190814-0003/
- http://packetstormsecurity.com/files/153748/FreeBSD-Security-Advisory-FreeBSD-SA-19-13.pts.html
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:13.pts.asc
- https://security.netapp.com/advisory/ntap-20190814-0003/