CVE-2019-5606 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

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/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8