Linux Kernel up to 4.18.5 drivers/cdrom/cdrom.c cdrom_ioctl_drive_status Kernel Memory information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.18.5. The affected element is the function cdrom_ioctl_drive_status of the file drivers/cdrom/cdrom.c. This manipulation causes information disclosure (Kernel Memory). This vulnerability is registered as CVE-2018-16658. The attack needs to be launched locally. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 4.18.5 (Operating System) and classified as problematic. Affected by this vulnerability is the function cdrom_ioctl_drive_status of the file drivers/cdrom/cdrom.c. The manipulation with an unknown input leads to a information disclosure vulnerability (Kernel Memory). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

An issue was discovered in the Linux kernel before 4.18.6. An information leak in cdrom_ioctl_drive_status in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking. This is similar to CVE-2018-10940.

The bug was discovered 08/29/2018. The weakness was published 09/07/2018 (Website). The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2018-16658 since 09/07/2018. An attack has to be approached locally. Required for exploitation is a single authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117769 (Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4227)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157820 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2018-4245)).

Upgrading to version 4.18.6 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117769) and SecurityFocus (BID 105334†). Similar entries are available at VDB-105729, VDB-113848 and VDB-120538. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Kernel Memory
Class: Information disclosure / Kernel Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117769
Nessus Name: Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4227)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.18.6
Patch: git.kernel.org

Timelineinfo

04/26/2018 🔍
08/29/2018 +125 days 🔍
09/07/2018 +8 days 🔍
09/07/2018 +0 days 🔍
09/07/2018 +0 days 🔍
09/08/2018 +1 days 🔍
09/26/2018 +18 days 🔍
09/27/2018 +1 days 🔍
05/07/2023 +1683 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2019:2029
Status: Confirmed

CVE: CVE-2018-16658 (🔍)
GCVE (CVE): GCVE-0-2018-16658
GCVE (VulDB): GCVE-100-123745

OVAL: 🔍

SecurityFocus: 105334 - Linux Kernel 'drivers/cdrom/cdrom.c' Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 09/08/2018 08:43
Updated: 05/07/2023 14:37
Changes: 09/08/2018 08:43 (81), 03/21/2020 16:38 (4), 05/07/2023 14:37 (5)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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