CVE-2021-20208 is a flaw in cifs-utils versions prior to 6.13, allowing a user within a container to leverage host Kerberos credentials when mounting a krb5 CIFS filesystem. This vulnerability primarily impacts data confidentiality and integrity across various Fedora, Red Hat Enterprise Linux, and Samba cifs-utils products. Rated Medium severity with a CVSS score of 6.1, it requires local access and high attack complexity, but could lead to significant data compromise. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.0, < 6.13CPE matchmatch criteria | cpe:2.3:a:samba:cifs-utils:*:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.0 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2021-20208
Mar 14, 2023A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.
Apr 13, 2021cifs-utils: Container can use kerberos cache from the host via mount.cifs/cifs.upcall
Apr 12, 2021