FreeBSD up to 11.2 NFS Server Length Field integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD up to 11.2. It has been classified as critical. Affected is an unknown function of the component NFS Server. The manipulation as part of Length Field leads to integer overflow. This vulnerability is traded as CVE-2018-17158. It is possible to launch the attack remotely. There is no exploit available. It is recommended to upgrade the affected component. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Detailsinfo

A vulnerability was found in FreeBSD up to 11.2 (Operating System) and classified as critical. This issue affects an unknown function of the component NFS Server. The manipulation as part of a Length Field leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error can occur when handling the client address length field in an NFSv4 request. Unprivileged remote users with access to the NFS server can crash the system by sending a specially crafted NFSv4 request.

The bug was discovered 11/27/2018. The weakness was presented 12/04/2018 by Jakub Jirasek with Secunia Research (Website). It is possible to read the advisory at security.freebsd.org. The identification of this vulnerability is CVE-2018-17158 since 09/18/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

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†). See VDB-127462 and VDB-127464 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

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-2018-17158 (🔍)
GCVE (CVE): GCVE-0-2018-17158
GCVE (VulDB): GCVE-100-127463
SecurityFocus: 106192 - FreeBSD Network File System Multiple Security Vulnerabilities
SecurityTracker: 1042164

See also: 🔍

Entryinfo

Created: 12/05/2018 08:12 AM
Updated: 06/12/2023 03:59 PM
Changes: 12/05/2018 08:12 AM (69), 04/17/2020 10:41 AM (5), 06/12/2023 03:59 PM (4)
Complete: 🔍
Cache ID: 18:A2F:40

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