National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-17807 Detail

Current Description

The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.

Source:  MITRE      Last Modified:  12/20/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-17807
Original release date:
12/20/2017
Last revised:
02/03/2018
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
3.3 Low
Vector:
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N (legend)
Impact Score:
1.4
Exploitability Score:
1.8
CVSS Version 3 Metrics:
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
Low
Availability (A):
None
CVSS Severity (version 2.0):
CVSS v2 Base Score:
2.1 LOW
Vector:
(AV:L/AC:L/Au:N/C:N/I:P/A:N) (legend)
Impact Subscore:
2.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4dca6ea1d9432052afb06baf2e3ae78188a4410b Issue Tracking; Patch External Source CONFIRM http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4dca6ea1d9432052afb06baf2e3ae78188a4410b
http://www.securityfocus.com/bid/102301 Third Party Advisory; VDB Entry External Source BID 102301
https://github.com/torvalds/linux/commit/4dca6ea1d9432052afb06baf2e3ae78188a4410b Issue Tracking; Patch External Source CONFIRM https://github.com/torvalds/linux/commit/4dca6ea1d9432052afb06baf2e3ae78188a4410b
https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html External Source MLIST [debian-lts-announce] 20180107 [SECURITY] [DLA 1232-1] linux security update
https://www.debian.org/security/2017/dsa-4073 Third Party Advisory External Source DEBIAN DSA-4073
https://www.debian.org/security/2018/dsa-4082 External Source DEBIAN DSA-4082
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6 Issue Tracking; Mailing List; Release Notes External Source CONFIRM https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)

Change History 5 change records found - show changes