CVE-2021-3178
Linux Kernel NFS Denial of Service/Traversal
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
INFO
Published Date :
Jan. 19, 2021, 7:15 a.m.
Last Modified :
Aug. 3, 2024, 5:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
1.2
Public PoC/Exploit Available at Github
CVE-2021-3178 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-3178
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3178.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Map Vulnerabilities into Different Layers of the Container Image
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3178 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3178 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Aug. 03, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 17, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 11, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Mar. 21, 2024
Action Type Old Value New Value Added Tag MITRE disputed -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed 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. 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 Added Reference MITRE https://patchwork.kernel.org/project/linux-nfs/patch/20210111210129.GA11652%40fieldses.org/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/ [No types assigned] Removed Reference MITRE https://patchwork.kernel.org/project/linux-nfs/patch/[email protected]/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/ -
Modified Analysis by [email protected]
Mar. 25, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 09, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html [No Types Assigned] -
Reanalysis by [email protected]
Feb. 01, 2021
Action Type Old Value New Value -
Reanalysis by [email protected]
Jan. 29, 2021
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Jan. 28, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6 Mailing List, Patch, Vendor Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/ Mailing List, Third Party Advisory Changed Reference Type https://patchwork.kernel.org/project/linux-nfs/patch/[email protected]/ No Types Assigned https://patchwork.kernel.org/project/linux-nfs/patch/[email protected]/ Mailing List, Patch, Vendor Advisory Added CWE NIST CWE-22 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.10.8 -
CVE Modified by [email protected]
Jan. 27, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/5SGB7TNDVQEOJ7NVTGX56UWHDNQM5TRC/ [No Types Assigned] -
CVE Modified by [email protected]
Jan. 20, 2021
Action Type Old Value New Value Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3178 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3178
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.20 }} -0.06%
score
0.57407
percentile