vulnwire
7.8high

CVE-2017-7889

The mm subsystem in the Linux kernel through 3.2 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows loca…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
7.8
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
0.3%
percentile 25%
Public exploits
0
none known

The mm subsystem in the Linux kernel through 3.2 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows local users to read or write to kernel memory locations in the first megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file, related to arch/x86/mm/init.c and drivers/char/mem.c.

Exploit prediction (EPSS)

0.32% probability of exploitation in the next 30 days, higher than 25% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.17.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD2.07.2AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource
Technology feeds
Linux kernel (RSS, critical only)

References

  • github.com /torvalds/linux/commit/a4866aa812518ed1a37d8ea0c881dc946409de94 · x_refsource_MISC, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a4866aa812518ed1a37d8ea0c881dc946409d · x_refsource_MISC, x_transferred
  • usn.ubuntu.com /3583-2/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • access.redhat.com /errata/RHSA-2017:2669 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2018:1854 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • usn.ubuntu.com /3583-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • debian.org /security/2017/dsa-3945 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • securityfocus.com /bid/97690 · vdb-entry, x_refsource_BID, x_transferred
  • access.redhat.com /errata/RHSA-2017:2077 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • openwall.com /lists/oss-security/2017/04/16/4 · x_refsource_MISC, x_transferred
  • access.redhat.com /errata/RHSA-2017:1842 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • git.kernel.org /pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b8f254aa17f720053054c4ecff3920973a83b9d6 · x_refsource_CONFIRM, x_transferred

Sources

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