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CVE-2021-3178

MEDIUM

6.5

Description

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 Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published1/19/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

debian:debian_linuxfedoraproject:fedoralinux:linux_kernel

Weaknesses (CWE)

CWE-22

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6(cve@mitre.org)

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/(cve@mitre.org)

https://patchwork.kernel.org/project/linux-nfs/patch/20210111210129.GA11652%40fieldses.org/(cve@mitre.org)

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/(af854a3a-2127-422b-91ae-364da2661108)

https://patchwork.kernel.org/project/linux-nfs/patch/20210111210129.GA11652%40fieldses.org/(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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