FreeBSD up to 11.1/11.2 System Call freebsd4_getfsstat null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD up to 11.1/11.2. It has been declared as problematic. The affected element is the function freebsd4_getfsstat of the component System Call Handler. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2018-17154. Local access is required to approach this attack. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in FreeBSD up to 11.1/11.2 (Operating System) and classified as problematic. Affected by this issue is the function freebsd4_getfsstat of the component System Call Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

In FreeBSD before 11.2-STABLE(r338987), 11.2-RELEASE-p4, and 11.1-RELEASE-p15, due to insufficient memory checking in the freebsd4_getfsstat system call, a NULL pointer dereference can occur. Unprivileged authenticated local users may be able to cause a denial of service.

The bug was discovered 09/27/2018. The weakness was disclosed 09/28/2018 (Website). The advisory is shared for download at security.FreeBSD.org. This vulnerability is handled as CVE-2018-17154 since 09/18/2018. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is 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.

The entries VDB-124596 and VDB-124593 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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

09/18/2018 🔍
09/27/2018 +9 days 🔍
09/28/2018 +0 days 🔍
09/28/2018 +0 days 🔍
09/29/2018 +1 days 🔍
05/19/2023 +1693 days 🔍

Sourcesinfo

Product: freebsd.org

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

CVE: CVE-2018-17154 (🔍)
GCVE (CVE): GCVE-0-2018-17154
GCVE (VulDB): GCVE-100-124592
See also: 🔍

Entryinfo

Created: 09/29/2018 07:40
Updated: 05/19/2023 14:31
Changes: 09/29/2018 07:40 (44), 03/28/2020 08:37 (8), 05/19/2023 14:31 (13)
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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