Linux Kernel up to 4.16.8 kernel/compat.c compat_get_timex Kernel Memory information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.16.8. Affected by this issue is the function compat_get_timex of the file kernel/compat.c. This manipulation causes information disclosure (Kernel Memory). This vulnerability appears as CVE-2018-11508. The attack requires local access. In addition, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 4.16.8 (Operating System) and classified as problematic. Affected by this vulnerability is the function compat_get_timex of the file kernel/compat.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:

The compat_get_timex function in kernel/compat.c in the Linux kernel before 4.16.9 allows local users to obtain sensitive information from kernel memory via adjtimex.

The bug was discovered 05/11/2018. The weakness was presented 05/28/2018 (Website). The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2018-11508 since 05/28/2018. An attack has to be approached locally. The successful exploitation needs a single authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1592 for this issue.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 17 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110899 (Ubuntu 16.04 LTS : linux-oem vulnerabilities (USN-3697-2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197183 (Ubuntu Security Notification for Linux, Linux-aws, Linux-azure, Linux-gcp, Linux-kvm, Linux-oem, Linux-raspi2 Vulnerabilities (USN-3695-1)).

Upgrading to version 4.16.9 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (46208), Tenable (110899) and SecurityFocus (BID 104292†). See VDB-114232 and VDB-115504 for similar entries. 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: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110899
Nessus Name: Ubuntu 16.04 LTS : linux-oem vulnerabilities (USN-3697-2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.16.9
Patch: git.kernel.org

Timelineinfo

05/11/2018 🔍
05/28/2018 +16 days 🔍
05/28/2018 +0 days 🔍
05/28/2018 +0 days 🔍
05/28/2018 +0 days 🔍
05/29/2018 +1 days 🔍
07/02/2018 +34 days 🔍
07/03/2018 +1 days 🔍
11/28/2024 +2340 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3697-2
Status: Confirmed

CVE: CVE-2018-11508 (🔍)
GCVE (CVE): GCVE-0-2018-11508
GCVE (VulDB): GCVE-100-118273
SecurityFocus: 104292 - Linux Kernel 'kernel/compat.c' Local Information Disclosure Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/29/2018 09:05
Updated: 11/28/2024 07:45
Changes: 05/29/2018 09:05 (79), 02/09/2020 11:24 (8), 03/17/2023 12:42 (5), 03/17/2023 12:50 (1), 03/17/2023 12:58 (1), 11/28/2024 07:45 (14)
Complete: 🔍
Cache ID: 216::103

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

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