** 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.
CVE-2021-3178 - Medium Severity Vulnerability
Yocto Linux Embedded kernel
Library home page: https://git.yoctoproject.org/git/linux-yocto
Found in base branch: master
** 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.
Publish Date: 2021-01-19
URL: CVE-2021-3178
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: High - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://nvd.nist.gov/vuln/detail/CVE-2021-3178
Release Date: 2021-01-19
Fix Resolution: linux-libc-headers - 5.13;linux-yocto - 5.4.20+gitAUTOINC+c11911d4d1_f4d7dbafb1,4.8.26+gitAUTOINC+1c60e003c7_27efc3ba68
Step up your Open Source Security Game with Mend here