FreeBSD up to 10.3/10.4/11.0/11.1 Kernel information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FreeBSD up to 10.3/10.4/11.0/11.1. The impacted element is an unknown function of the component Kernel. The manipulation leads to information disclosure. This vulnerability is listed as CVE-2017-1088. The attack must be carried out locally. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in FreeBSD up to 10.3/10.4/11.0/11.1 (Operating System). This issue affects an unknown functionality of the component Kernel. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p4, 11.0-RELEASE-p15, 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24, the kernel does not properly clear the memory of the kld_file_stat structure before filling the data. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information from the kernel stack is possible. As a result, some bytes from the kernel stack can be observed in userspace.

The bug was discovered 11/15/2017. The weakness was presented 11/16/2017 (Website). It is possible to read the advisory at freebsd.org. The identification of this vulnerability is CVE-2017-1088 since 11/30/2016. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

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 vulnerability scanner Nessus provides a plugin with the ID 105066 (FreeBSD : FreeBSD -- Information leak in kldstat(2) (759059ac-dab3-11e7-b5af-a4badb2f4699)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading 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 (105066) and SecurityFocus (BID 101857†). See VDB-109522 and VDB-109521 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

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

NVD Base Score: 3.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
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: 105066
Nessus Name: FreeBSD : FreeBSD -- Information leak in kldstat(2) (759059ac-dab3-11e7-b5af-a4badb2f4699)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

11/30/2016 🔍
11/15/2017 +350 days 🔍
11/15/2017 +0 days 🔍
11/16/2017 +1 days 🔍
11/16/2017 +0 days 🔍
11/17/2017 +1 days 🔍
12/06/2017 +19 days 🔍
12/07/2017 +1 days 🔍
01/24/2021 +1144 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: freebsd.org
Researcher: TJ Corley
Status: Not defined

CVE: CVE-2017-1088 (🔍)
GCVE (CVE): GCVE-0-2017-1088
GCVE (VulDB): GCVE-100-109523
SecurityFocus: 101857 - FreeBSD CVE-2017-1088 Local Information Disclosure Vulnerability
SecurityTracker: 1039811

See also: 🔍

Entryinfo

Created: 11/17/2017 08:05
Updated: 01/24/2021 09:47
Changes: 11/17/2017 08:05 (70), 12/07/2019 15:00 (4), 01/24/2021 09:42 (2), 01/24/2021 09:47 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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