Linux Kernel up to 5.10.8 NFS Export fs/nfsd/nfs3xdr.c no_subtree_check path traversal ⚔ [Disputed]

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.10.8. It has been classified as critical. This impacts the function no_subtree_check of the file fs/nfsd/nfs3xdr.c of the component NFS Export Handler. The manipulation leads to path traversal. This vulnerability is traded as CVE-2021-3178. It is possible to initiate the attack remotely. There is no exploit available. There is ongoing doubt regarding the real existence of this vulnerability. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.8 (Operating System) and classified as critical. This issue affects the function no_subtree_check of the file fs/nfsd/nfs3xdr.c of the component NFS Export Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability.

The weakness was shared 01/19/2021. The advisory is shared at patchwork.kernel.org. The identification of this vulnerability is CVE-2021-3178. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The real existence of this vulnerability is still doubted at the moment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at patchwork.kernel.org.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Path traversal
CWE: CWE-22
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: patchwork.kernel.org

Timelineinfo

01/19/2021 🔍
01/19/2021 +0 days 🔍
01/19/2021 +0 days 🔍
08/03/2024 +1292 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: patchwork.kernel.org
Status: Confirmed
Disputed: 🔍

CVE: CVE-2021-3178 (🔍)
GCVE (CVE): GCVE-0-2021-3178
GCVE (VulDB): GCVE-100-168089

Entryinfo

Created: 01/19/2021 14:26
Updated: 08/03/2024 19:40
Changes: 01/19/2021 14:26 (43), 02/15/2021 09:54 (5), 02/15/2021 09:59 (18), 08/03/2024 19:40 (17)
Complete: 🔍
Cache ID: 216::103

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