FreeBSD up to 11.2 NFS Server READDIRPLUS Request resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in FreeBSD up to 11.2. The impacted element is an unknown function of the component NFS Server. The manipulation as part of READDIRPLUS Request results in resource consumption. This vulnerability is cataloged as CVE-2018-17159. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in FreeBSD up to 11.2 (Operating System). It has been classified as problematic. Affected is an unknown functionality of the component NFS Server. The manipulation as part of a READDIRPLUS Request leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, the NFS server lacks a bounds check in the READDIRPLUS NFS request. Unprivileged remote users with access to the NFS server can cause a resource exhaustion by forcing the server to allocate an arbitrarily large memory allocation.

The bug was discovered 11/27/2018. The weakness was shared 12/04/2018 by Jakub Jirasek with Secunia Research (Website). The advisory is shared for download at security.freebsd.org. This vulnerability is traded as CVE-2018-17159 since 09/18/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 119307 (FreeBSD < 11.2-RELEASE-p5 Multiple vulnerabilities in NFS server code (FreeBSD-SA-18:03.nfs)), 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 to version 11.2-STABLE(r340854) or 11.2-RELEASE-p5 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119307) and SecurityFocus (BID 106192†). The entries VDB-127462 and VDB-127463 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 119307
Nessus Name: FreeBSD < 11.2-RELEASE-p5 Multiple vulnerabilities in NFS server code (FreeBSD-SA-18:03.nfs)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FreeBSD 11.2-STABLE(r340854)/11.2-RELEASE-p5

Timelineinfo

09/18/2018 🔍
11/27/2018 +70 days 🔍
11/27/2018 +0 days 🔍
11/27/2018 +0 days 🔍
11/30/2018 +3 days 🔍
12/04/2018 +4 days 🔍
12/04/2018 +0 days 🔍
12/05/2018 +1 days 🔍
06/12/2023 +1650 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: security.freebsd.org
Researcher: Jakub Jirasek
Organization: Secunia Research
Status: Not defined

CVE: CVE-2018-17159 (🔍)
GCVE (CVE): GCVE-0-2018-17159
GCVE (VulDB): GCVE-100-127464
SecurityFocus: 106192 - FreeBSD Network File System Multiple Security Vulnerabilities
SecurityTracker: 1042164

See also: 🔍

Entryinfo

Created: 12/05/2018 08:12
Updated: 06/12/2023 16:06
Changes: 12/05/2018 08:12 (70), 04/17/2020 10:48 (5), 06/12/2023 16:06 (4)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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