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CVE-2017-5669

Public on 2017-02-24
Modified on 2017-04-17
Description

The do_shmat function in ipc/shm.c in the Linux kernel, through 4.9.12, does not restrict the address calculated by a certain rounding operation. This allows privileged local users to map page zero and, consequently, bypass a protection mechanism that exists for the mmap system call. This is possible by making crafted shmget and shmat system calls in a privileged context.

Severity
Low
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CVSS v3 Base Score
6.7
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2017-04-06 21:16 ALAS-2017-814

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.7 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H