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FreeBSD: VID-759059AC-DAB3-11E7-B5AF-A4BADB2F4699 (CVE-2017-1088): FreeBSD -- Information leak in kldstat(2)

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FreeBSD: VID-759059AC-DAB3-11E7-B5AF-A4BADB2F4699 (CVE-2017-1088): FreeBSD -- Information leak in kldstat(2)

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
11/15/2017
Created
07/25/2018
Added
12/06/2017
Modified
05/03/2019

Description

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24, the kernel does not properly clear the memory of the kld_file_stat structure before filling the data. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information from the kernel stack is possible. As a result, some bytes from the kernel stack can be observed in userspace.

Solution(s)

  • freebsd-upgrade-base-10_3-release-p24
  • freebsd-upgrade-base-10_4-release-p3
  • freebsd-upgrade-base-11_0-release-p15
  • freebsd-upgrade-base-11_1-release-p4

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