Vulnerability CVE-2017-12193
Published: 2017-11-22

Description:
The assoc_array_insert_into_terminal_node function in lib/assoc_array.c in the Linux kernel before 4.13.11 mishandles node splitting, which allows local users to cause a denial of service (NULL pointer dereference and panic) via a crafted application, as demonstrated by the keyring key type, and key addition and link creation operations.

Type:

CWE-476

 (NULL Pointer Dereference)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Linux -> Linux kernel 

 References:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea6789980fdaa610d7eb63602c746bf6ec70cd2b
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
http://www.securityfocus.com/bid/101678
https://access.redhat.com/errata/RHSA-2018:0151
https://bugzilla.redhat.com/show_bug.cgi?id=1501215
https://github.com/torvalds/linux/commit/ea6789980fdaa610d7eb63602c746bf6ec70cd2b
https://usn.ubuntu.com/3698-1/
https://usn.ubuntu.com/3698-2/
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