FreeBSD up to 10.3/10.4/11.0/11.1 Debugger 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 classified as problematic has been found in FreeBSD up to 10.3/10.4/11.0/11.1. Impacted is an unknown function of the component Debugger. Performing a manipulation results in information disclosure. This vulnerability is identified as CVE-2017-1086. The attack is only possible with local access. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in FreeBSD up to 10.3/10.4/11.0/11.1 (Operating System). This affects some unknown processing of the component Debugger. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on 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, not all information in the struct ptrace_lwpinfo is relevant for the state of any thread, and the kernel does not fill the irrelevant bytes or short strings. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information of the kernel stack of the thread is possible from the debugger. As a result, some bytes from the kernel stack of the thread using ptrace (PT_LWPINFO) call can be observed in userspace.

The bug was discovered 11/15/2017. The weakness was released 11/16/2017 (Website). The advisory is shared at freebsd.org. This vulnerability is uniquely identified as CVE-2017-1086 since 11/30/2016. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly 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 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105064 (FreeBSD : FreeBSD -- Kernel data leak via ptrace(PT_LWPINFO) (34a3f9b5-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 (105064) and SecurityFocus (BID 101861†). Entries connected to this vulnerability are available at VDB-109523 and VDB-109522. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

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: 105064
Nessus Name: FreeBSD : FreeBSD -- Kernel data leak via ptrace(PT_LWPINFO) (34a3f9b5-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: John Baldwin
Status: Not defined

CVE: CVE-2017-1086 (🔍)
GCVE (CVE): GCVE-0-2017-1086
GCVE (VulDB): GCVE-100-109521
SecurityFocus: 101861 - FreeBSD CVE-2017-1086 Local Information Disclosure Vulnerability
SecurityTracker: 1039809

See also: 🔍

Entryinfo

Created: 11/17/2017 08:05
Updated: 01/24/2021 09:27
Changes: 11/17/2017 08:05 (54), 12/07/2019 14:35 (10), 01/24/2021 09:16 (2), 01/24/2021 09:22 (9), 01/24/2021 09:27 (1)
Complete: 🔍
Cache ID: 216::103

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

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