FreeBSD up to 10.3/10.4/11.0 IPsec AH Packet use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in FreeBSD up to 10.3/10.4/11.0. Affected by this vulnerability is an unknown functionality of the component IPsec AH Handler. The manipulation as part of Packet leads to use after free. This vulnerability is listed as CVE-2018-6916. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in FreeBSD up to 10.3/10.4/11.0 (Operating System) and classified as problematic. This issue affects some unknown processing of the component IPsec AH Handler. The manipulation as part of a Packet leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. The summary by CVE is:

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7, and 10.3-RELEASE-p28, the kernel does not properly validate IPsec packets coming from a trusted host. Additionally, a use-after-free vulnerability exists in the IPsec AH handling code. This issue could cause a system crash or other unpredictable results.

The bug was discovered 03/07/2018. The weakness was presented 03/09/2018 (Website). It is possible to read the advisory at securitytracker.com. The identification of this vulnerability is CVE-2018-6916 since 02/12/2018. 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 109038 (pfSense < 2.4.3 Multiple Vulnerabilities (SA-18_01 / SA-18_02 / SA-18_03) (Meltdown) (Spectre)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls and running in the context r.

Applying a patch is able to eliminate this problem. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109038). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 9.8
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: Use after free
CWE: CWE-416 / CWE-119
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: 109038
Nessus Name: pfSense < 2.4.3 Multiple Vulnerabilities (SA-18_01 / SA-18_02 / SA-18_03) (Meltdown) (Spectre)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/21/2017 🔍
02/12/2018 +83 days 🔍
03/07/2018 +23 days 🔍
03/09/2018 +2 days 🔍
03/09/2018 +0 days 🔍
03/10/2018 +1 days 🔍
04/13/2018 +34 days 🔍
02/21/2023 +1775 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: securitytracker.com⛔
Status: Not defined

CVE: CVE-2018-6916 (🔍)
GCVE (CVE): GCVE-0-2018-6916
GCVE (VulDB): GCVE-100-114323
SecurityFocus: 103513
SecurityTracker: 1040460

Entryinfo

Created: 03/10/2018 22:44
Updated: 02/21/2023 08:33
Changes: 03/10/2018 22:44 (64), 01/12/2020 08:53 (2), 02/21/2023 08:32 (4), 02/21/2023 08:33 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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