CVE-2021-20316
samba: Symlink race error can allow metadata read and modify outside of the exported share
Severity Score
6.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.
Se ha encontrado un fallo en la forma en que Samba maneja los metadatos de los archivos/directorios. Este fallo permite a un atacante autenticado con permisos para leer o modificar los metadatos del recurso compartido, llevar a cabo esta operación fuera del recurso compartido.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2020-12-17 CVE Reserved
- 2022-05-10 CVE Published
- 2023-11-28 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://security-tracker.debian.org/tracker/CVE-2021-20316 | Mitigation |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-20316 | 2022-05-10 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2009673 | 2022-05-10 | |
| https://bugzilla.samba.org/show_bug.cgi?id=14842 | 2023-09-17 | |
| https://security.gentoo.org/glsa/202309-06 | 2023-09-17 | |
| https://www.samba.org/samba/security/CVE-2021-20316.html | 2023-09-17 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Samba Search vendor "Samba" | Samba Search vendor "Samba" for product "Samba" | < 4.15.0 Search vendor "Samba" for product "Samba" and version " < 4.15.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Virtualization Host Search vendor "Redhat" for product "Virtualization Host" | 4.0 Search vendor "Redhat" for product "Virtualization Host" and version "4.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Aus Search vendor "Redhat" for product "Enterprise Linux Aus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Aus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Tus Search vendor "Redhat" for product "Enterprise Linux Tus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Tus" and version "8.6" | - |
Affected
| ||||||