Linux Kernel up to 4.15.7 mce.c store_int_with_restart race condition ⚔ [Disputed]
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 3.9 | $0-$5k | 0.00 |
Summary
A vulnerability was found in Linux Kernel up to 4.15.7. It has been rated as problematic. Affected by this issue is the function store_int_with_restart of the file arch/x86/kernel/cpu/mcheck/mce.c. The manipulation leads to race condition.
This vulnerability is handled as CVE-2018-7995. It is possible to launch the attack on the local host. There is no exploit available.
The real existence of this vulnerability is still doubted at the moment.
It is recommended to upgrade the affected component.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Details
A vulnerability was found in Linux Kernel up to 4.15.7 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function store_int_with_restart of the file arch/x86/kernel/cpu/mcheck/mce.c. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect availability. The summary by CVE is:
Race condition in the store_int_with_restart() function in arch/x86/kernel/cpu/mcheck/mce.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (panic) by leveraging root access to write to the check_interval file in a /sys/devices/system/machinecheck/machinecheck<cpu number> directory.
The bug was discovered 03/08/2018. The weakness was presented 03/09/2018 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2018-7995 since 03/09/2018. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.
The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The real existence of this vulnerability is still doubted at the moment. The vulnerability scanner Nessus provides a plugin with the ID 108427 (Fedora 26 : kernel (2018-bf60ec1389)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277239 (Fedora Security Update for kernel (FEDORA-2018-cf76003e1f)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at Tenable (108427) and SecurityFocus (BID 103356†). See VDB-114355 for similar entry. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.0VulDB Meta Temp Score: 3.9
VulDB Base Score: 2.5
VulDB Temp Score: 2.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 4.7
NVD Vector: 🔍
CNA Base Score: 4.7
CNA Vector: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| 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: Race conditionCWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍
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: 108427
Nessus Name: Fedora 26 : kernel (2018-bf60ec1389)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 64762
OpenVAS Name: Fedora Update for kernel FEDORA-2018-cf76003e1f
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: git.kernel.org
Timeline
03/08/2018 🔍03/09/2018 🔍
03/09/2018 🔍
03/09/2018 🔍
03/09/2018 🔍
03/10/2018 🔍
03/16/2018 🔍
03/19/2018 🔍
08/05/2024 🔍
Sources
Vendor: kernel.orgAdvisory: FEDORA-2018-bf60ec1389⛔
Status: Confirmed
Disputed: 🔍
CVE: CVE-2018-7995 (🔍)
GCVE (CVE): GCVE-0-2018-7995
GCVE (VulDB): GCVE-100-114343
OVAL: 🔍
SecurityFocus: 103356 - Linux Kernel 'arch/x86/kernel/cpu/mcheck/mce.c' Local Denial of Service Vulnerability
See also: 🔍
Entry
Created: 03/10/2018 03:26 PMUpdated: 08/05/2024 09:30 AM
Changes: 03/10/2018 03:26 PM (78), 01/12/2020 10:38 AM (5), 02/21/2023 08:53 AM (5), 02/21/2023 08:57 AM (1), 06/18/2024 11:05 PM (44), 08/05/2024 09:30 AM (2)
Complete: 🔍
Cache ID: 18:CBE:40
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