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.
References
| Link | 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 |
Configurations
Configuration 1 (hide)
|
History
10 Mar 2022, 14:59
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| CVSS |
v2 : v3 : |
v2 : 6.5
v3 : 8.8 |
| CPE | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | |
| References | (MISC) https://bugzilla.samba.org/show_bug.cgi?id=14468 - Issue Tracking, Patch, Vendor Advisory | |
| References | (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2021726 - Issue Tracking, Third Party Advisory | |
| References | (MISC) https://www.samba.org/samba/security/CVE-2021-3738.html - Vendor Advisory |
02 Mar 2022, 23:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2022-03-02 23:15
Updated : 2024-02-04 22:29
NVD link : CVE-2021-3738
Mitre link : CVE-2021-3738
CVE.ORG link : CVE-2021-3738
JSON object : View
Products Affected
samba
- samba
CWE
CWE-416
Use After Free