VDB-109522 · CVE-2017-1087 · BID 101867

FreeBSD up to 10.3/10.4/11.0/11.1 Shared Memory access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

A vulnerability classified as critical was found in FreeBSD up to 10.3/10.4/11.0/11.1 (Operating System). This vulnerability affects an unknown function of the component Shared Memory. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In FreeBSD 10.x before 10.4-STABLE, 10.4-RELEASE-p3, and 10.3-RELEASE-p24 named paths are globally scoped, meaning a process located in one jail can read and modify the content of POSIX shared memory objects created by a process in another jail or the host system. As a result, a malicious user that has access to a jailed system is able to abuse shared memory by injecting malicious content in the shared memory region. This memory region might be executed by applications trusting the shared memory, like Squid. This issue could lead to a Denial of Service or local privilege escalation.

The bug was discovered 11/15/2017. The weakness was disclosed 11/16/2017 (Website). The advisory is available at freebsd.org. This vulnerability was named CVE-2017-1087 since 11/30/2016. The exploitation appears to be easy. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

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 $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 105065 (FreeBSD : FreeBSD -- POSIX shm allows jails to access global namespace (5b1463dd-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 vulnerability database at Tenable (105065). The entries 109523 and 109521 are pretty similar.

Productinfo

Type

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 105065
Nessus Name: FreeBSD : FreeBSD -- POSIX shm allows jails to access global namespace (5b1463dd-dab3-11e7-b5af-a4badb2f4699)
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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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: Whitewinterwolf
Status: Not defined

CVE: CVE-2017-1087 (🔍)
SecurityTracker: 1039810
SecurityFocus: 101867 - FreeBSD CVE-2017-1087 Local Privilege Escalation Vulnerabiity

See also: 🔍

Entryinfo

Created: 11/17/2017 08:05
Updated: 01/24/2021 09:39
Changes: 11/17/2017 08:05 (69), 12/07/2019 14:46 (4), 01/24/2021 09:33 (2), 01/24/2021 09:39 (1)
Complete: 🔍

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