CVE-2021-20316
MEDIUMCVSS 6.8/10EPSS 0.76%
Last modified
CVE-2021-20316 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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.. EPSS estimates a 0.76% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Samba | Samba | < 4.15.0 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
| Redhat | Virtualization Host | 4.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Aus | 8.6 |
| Redhat | Enterprise Linux Eus | 8.6 |
| Redhat | Enterprise Linux Tus | 8.6 |
References
- https://access.redhat.com/security/cve/CVE-2021-20316Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2009673Issue Tracking, Third Party Advisory
- https://bugzilla.samba.org/show_bug.cgi?id=14842Issue Tracking, Vendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-20316Mitigation, Third Party Advisory
- https://www.samba.org/samba/security/CVE-2021-20316.htmlVendor Advisory
- https://access.redhat.com/security/cve/CVE-2021-20316Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2009673Issue Tracking, Third Party Advisory
- https://bugzilla.samba.org/show_bug.cgi?id=14842Issue Tracking, Vendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-20316Mitigation, Third Party Advisory
- https://www.samba.org/samba/security/CVE-2021-20316.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20316?
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.
How severe is CVE-2021-20316?
CVE-2021-20316 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20316?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-20316?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST