FreeBSD up to 11.1 IPsec Option Header length resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD up to 11.1. It has been rated as problematic. The impacted element is an unknown function of the component IPsec Option Header Handler. Performing a manipulation of the argument length results in resource management. This vulnerability is known as CVE-2018-6918. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in FreeBSD up to 11.1 (Operating System). This affects an unknown function of the component IPsec Option Header Handler. The manipulation of the argument length with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, the length field of the ipsec option header does not count the size of the option header itself, causing an infinite loop when the length is zero. This issue can allow a remote attacker who is able to send an arbitrary packet to cause the machine to crash.

The bug was discovered 04/04/2018. The weakness was published 04/04/2018 by Maxime Villard (Website). It is possible to read the advisory at security.FreeBSD.org. This vulnerability is uniquely identified as CVE-2018-6918 since 02/12/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 108859 (FreeBSD : FreeBSD -- ipsec crash or denial of service (c0c5afef-38db-11e8-8b7f-a4badb2f469b)), 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 11.1-STABLE eliminates this vulnerability. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (108859) and SecurityFocus (BID 103666†). Similar entry is available at VDB-135834. Be aware that VulDB is the high quality source for vulnerability data.

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 management
CWE: CWE-399 / 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: 108859
Nessus Name: FreeBSD : FreeBSD -- ipsec crash or denial of service (c0c5afef-38db-11e8-8b7f-a4badb2f469b)
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: 🔍

Upgrade: FreeBSD 11.1-STABLE

Timelineinfo

02/12/2018 🔍
04/04/2018 +51 days 🔍
04/04/2018 +0 days 🔍
04/04/2018 +0 days 🔍
04/04/2018 +0 days 🔍
04/05/2018 +1 days 🔍
04/05/2018 +0 days 🔍
04/06/2018 +1 days 🔍
02/09/2021 +1040 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: security.FreeBSD.org
Researcher: Maxime Villard
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-6918 (🔍)
GCVE (CVE): GCVE-0-2018-6918
GCVE (VulDB): GCVE-100-115815
SecurityFocus: 103666 - FreeBSD CVE-2018-6918 Denial of Service Vulnerability
SecurityTracker: 1040628

See also: 🔍

Entryinfo

Created: 04/05/2018 08:49
Updated: 02/09/2021 07:06
Changes: 04/05/2018 08:49 (70), 01/22/2020 10:42 (6), 02/09/2021 07:06 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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