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

CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.2 | $0-$5k | 0.00 |
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.
Product
Type
Vendor
Name
License
- open-source
CPE 2.3
CPE 2.2
CVSSv3
VulDB Meta Base Score: 4.3VulDB Meta Temp Score: 4.2
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 3.3
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Access controlCWE: CWE-284 / CWE-266
ATT&CK: T1068
Local: Yes
Remote: No
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 105433
Nessus Name: Debian DSA-4073-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 56363
OpenVAS Name: Debian Lts Announce DLA 1232-1 ([SECURITY] [DLA 1232-1] linux security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: Kernel 4.14.6
Patch: git.kernel.org
Timeline
12/08/2017 🔍12/20/2017 🔍
12/20/2017 🔍
12/20/2017 🔍
12/20/2017 🔍
12/21/2017 🔍
12/23/2017 🔍
12/26/2017 🔍
01/18/2023 🔍
Sources
Vendor: kernel.orgAdvisory: 4dca6ea1d9432052afb06baf2e3ae78188a4410b
Researcher: Eric Biggers.
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2017-17807 (🔍)
OVAL: 🔍
SecurityFocus: 102301 - Linux Kernel CVE-2017-17807 Local Denial of Service Vulnerability
See also: 🔍
Entry
Created: 12/21/2017 08:46 AMUpdated: 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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