FreeBSD up to 10.4/11.1/11.2 IPv6 Protocol Control Block Flag null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in FreeBSD up to 10.4/11.1/11.2. Affected is an unknown function of the component IPv6 Protocol Control Block Flag Handler. The manipulation results in null pointer dereference. This vulnerability is identified as CVE-2018-6925. The attack is only possible with local access. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as problematic has been found in FreeBSD up to 10.4/11.1/11.2 (Operating System). Affected is an unknown part of the component IPv6 Protocol Control Block Flag Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In FreeBSD before 11.2-STABLE(r338986), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338985), and 10.4-RELEASE-p13, due to improper maintenance of IPv6 protocol control block flags through various failure paths, an unprivileged authenticated local user may be able to cause a NULL pointer dereference causing the kernel to crash.

The bug was discovered 09/27/2018. The weakness was released 09/28/2018 (Website). The advisory is shared for download at security.FreeBSD.org. This vulnerability is traded as CVE-2018-6925 since 02/11/2018. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

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 $0-$5k.

Applying a patch is able to eliminate this problem.

Entries connected to this vulnerability are available at VDB-124593 and VDB-124592. Once again VulDB remains the best source 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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/11/2018 🔍
09/27/2018 +227 days 🔍
09/28/2018 +0 days 🔍
09/28/2018 +0 days 🔍
09/29/2018 +1 days 🔍
03/28/2020 +546 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: security.FreeBSD.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-6925 (🔍)
GCVE (CVE): GCVE-0-2018-6925
GCVE (VulDB): GCVE-100-124596
See also: 🔍

Entryinfo

Created: 09/29/2018 07:41
Updated: 03/28/2020 08:51
Changes: 09/29/2018 07:41 (58), 03/28/2020 08:51 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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