VDB-110933 · CVE-2017-17807 · BID 102301

Linux Kernel up to 4.14.5 KEYS Subsystem request_key.c request_key System Calls access control

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Linux Kernel up to 4.14.5 (Operating System). It has been rated as critical. This issue affects the function request_key of the file security/keys/request_key.c of the component KEYS Subsystem. The manipulation as part of a System Calls leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability.

The bug was discovered 12/08/2017. The weakness was presented 12/20/2017 as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2017-17807 since 12/20/2017. An attack has to be approached locally. A simple authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105433 (Debian DSA-4073-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157931 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2019-4575)).

Upgrading to version 4.14.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (105433). See 110931, 110932, 111024 and 111025 for similar entries.






  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.3
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Class: Access control
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 105433
Nessus Name: Debian DSA-4073-1 : linux - security update
Nessus File: 🔍
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OpenVAS ID: 56363
OpenVAS Name: Debian Lts Announce DLA 1232-1 ([SECURITY] [DLA 1232-1] linux security update)
OpenVAS File: 🔍
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Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Patch
Status: 🔍

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Upgrade: Kernel 4.14.6
Patch: git.kernel.org


12/08/2017 🔍
12/20/2017 +12 days 🔍
12/20/2017 +0 days 🔍
12/20/2017 +0 days 🔍
12/20/2017 +0 days 🔍
12/21/2017 +1 days 🔍
12/23/2017 +2 days 🔍
12/26/2017 +3 days 🔍
01/18/2023 +1849 days 🔍


Vendor: kernel.org

Advisory: 4dca6ea1d9432052afb06baf2e3ae78188a4410b
Researcher: Eric Biggers.
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-17807 (🔍)

SecurityFocus: 102301 - Linux Kernel CVE-2017-17807 Local Denial of Service Vulnerability

See also: 🔍


Created: 12/21/2017 08:46 AM
Updated: 01/18/2023 02:22 PM
Changes: 12/21/2017 08:46 AM (85), 12/28/2019 10:17 AM (5), 01/27/2021 05:00 PM (2), 01/18/2023 02:21 PM (2), 01/18/2023 02:22 PM (1)
Complete: 🔍


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