CVE-2021-3178

 

Published at: - 19-01-2021 08:15

Last modified: - 26-10-2022 01:44

Total changes: - 10

Description

** DISPUTED ** fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

 

Verification logic

 

Reference

• https://patchwork.kernel.org/project/linux-nfs/patch/20210111210129.GA11652@fieldses.org/
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6
• FEDORA-2021-3bcc7198c8-Mailing List, Third Party Advisory
• [debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2021-3178

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures