High severity · published Feb 18, 2022
CVE-2020-25719
A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication
7.2
CVSS
1.7%
EPSS
No
On KEV
Description
A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require a Kerberos PAC and always use the SIDs found within. The result could include total domain compromise.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux For Ibm Z Systems · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux For Ibm Z Systems Eus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux For Power Big Endian · Redhat
7.0 · source: NVD
EL
Enterprise Linux For Power Little Endian · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux For Power Little Endian Eus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux For Scientific Computing · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
8.2; 8.4 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
8.2; 8.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25719
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25719
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2019732
security.gentoo.org
https://security.gentoo.org/glsa/202309-06
Mitigation
https://www.samba.org/samba/security/CVE-2020-25719.html
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