CVE-2021-3738
Microsoft Sam shared database entity use-after-free vulnerability in DCE/RPC
Description
In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam.ldb database. However while the database was correctly shared, the user credentials state was only pointed at, and when one connection within that association group ended, the database would be left pointing at an invalid 'struct session_info'. The most likely outcome here is a crash, but it is possible that the use-after-free could instead allow different user state to be pointed at and this might allow more privileged access.
INFO
Published Date :
March 2, 2022, 11:15 p.m.
Last Modified :
Sept. 17, 2023, 9:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
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-2021-3738.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2021726 | Issue Tracking Third Party Advisory |
| https://bugzilla.samba.org/show_bug.cgi?id=14468 | Issue Tracking Patch Vendor Advisory |
| https://security.gentoo.org/glsa/202309-06 | |
| https://www.samba.org/samba/security/CVE-2021-3738.html | Vendor Advisory |
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3738 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3738 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]
Sep. 17, 2023
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202309-06 [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 10, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2021726 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2021726 Issue Tracking, Third Party Advisory Changed Reference Type https://bugzilla.samba.org/show_bug.cgi?id=14468 No Types Assigned https://bugzilla.samba.org/show_bug.cgi?id=14468 Issue Tracking, Patch, Vendor Advisory Changed Reference Type https://www.samba.org/samba/security/CVE-2021-3738.html No Types Assigned https://www.samba.org/samba/security/CVE-2021-3738.html Vendor Advisory Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (excluding) 4.13.14 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.14.0 up to (excluding) 4.14.10 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.15.0 up to (excluding) 4.15.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3738 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-2021-3738
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.23 }} 0.03%
score
0.61254
percentile