CVE-2021-3738
CVSS V2 Medium 6.5
CVSS V3 High 8.8
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.
Overview
- CVE ID
- CVE-2021-3738
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2022-03-02T23:15:09
- Last Modified Date
- 2022-03-10T14:59:45
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 1 | OR | 4.0.0 | 4.13.14 |
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 1 | OR | 4.14.0 | 4.14.10 |
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 1 | OR | 4.15.0 | 4.15.2 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 6.5
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 8.8
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2021726 | Issue Tracking Third Party Advisory |
| https://www.samba.org/samba/security/CVE-2021-3738.html | Vendor Advisory |
| https://bugzilla.samba.org/show_bug.cgi?id=14468 | Issue Tracking Patch Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-3738 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3738 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 15:46:31 | Added to TrackCVE | |||
| 2022-12-06 11:11:44 | 2022-03-02T23:15Z | 2022-03-02T23:15:09 | CVE Published Date | updated |
| 2022-12-06 11:11:44 | 2022-03-10T14:59:45 | CVE Modified Date | updated | |
| 2022-12-06 11:11:44 | Analyzed | Vulnerability Status | updated |