CVE-2023-6660
NFS Client Buffer Overflow Disclosure Vulnerability
Description
When a program running on an affected system appends data to a file via an NFS client mount, the bug can cause the NFS client to fail to copy in the data to be written but proceed as though the copy operation had succeeded. This means that the data to be written is instead replaced with whatever data had been in the packet buffer previously. Thus, an unprivileged user with access to an affected system may abuse the bug to trigger disclosure of sensitive information. In particular, the leak is limited to data previously stored in mbufs, which are used for network transmission and reception, and for certain types of inter-process communication. The bug can also be triggered unintentionally by system applications, in which case the data written by the application to an NFS mount may be corrupted. Corrupted data is written over the network to the NFS server, and thus also susceptible to being snooped by other hosts on the network. Note that the bug exists only in the NFS client; the version and implementation of the server has no effect on whether a given system is affected by the problem.
INFO
Published Date :
Dec. 13, 2023, 9:15 a.m.
Last Modified :
March 22, 2024, 7:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2023-6660 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2023-6660.
| URL | Resource |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-SA-23:18.nfsclient.asc | Vendor Advisory |
| https://security.netapp.com/advisory/ntap-20240322-0002/ |
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).
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-6660 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-6660 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]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Mar. 22, 2024
Action Type Old Value New Value Added Reference FreeBSD https://security.netapp.com/advisory/ntap-20240322-0002/ [No types assigned] -
Initial Analysis by [email protected]
Dec. 20, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://security.freebsd.org/advisories/FreeBSD-SA-23:18.nfsclient.asc No Types Assigned https://security.freebsd.org/advisories/FreeBSD-SA-23:18.nfsclient.asc Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p5:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p6:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:14.0:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:14.0:beta5:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:14.0:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:14.0:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:14.0:rc3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:14.0:rc4-p1:*:*:*:*:*:* -
CVE Received by [email protected]
Dec. 13, 2023
Action Type Old Value New Value Added Description When a program running on an affected system appends data to a file via an NFS client mount, the bug can cause the NFS client to fail to copy in the data to be written but proceed as though the copy operation had succeeded. This means that the data to be written is instead replaced with whatever data had been in the packet buffer previously. Thus, an unprivileged user with access to an affected system may abuse the bug to trigger disclosure of sensitive information. In particular, the leak is limited to data previously stored in mbufs, which are used for network transmission and reception, and for certain types of inter-process communication. The bug can also be triggered unintentionally by system applications, in which case the data written by the application to an NFS mount may be corrupted. Corrupted data is written over the network to the NFS server, and thus also susceptible to being snooped by other hosts on the network. Note that the bug exists only in the NFS client; the version and implementation of the server has no effect on whether a given system is affected by the problem. Added Reference FreeBSD https://security.freebsd.org/advisories/FreeBSD-SA-23:18.nfsclient.asc [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-2023-6660 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-2023-6660
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.01%
score
0.15249
percentile