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CVE-2020-25719

HIGHCVSS 7.2/10EPSS 1.67%

Last modified

CVE-2020-25719 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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. EPSS estimates a 1.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
1.67%

73.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
SambaSamba>= 4.0.0, < 4.13.14
SambaSamba>= 4.14.0, < 4.14.10
SambaSamba>= 4.15.0, < 4.15.2
DebianDebian Linux9.0
DebianDebian Linux10.0
FedoraprojectFedora33
FedoraprojectFedora34
FedoraprojectFedora35
CanonicalUbuntu Linux20.04
CanonicalUbuntu Linux21.04
CanonicalUbuntu Linux21.10
RedhatEnterprise Linux7.0
RedhatEnterprise Linux8.0
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Eus8.2
RedhatEnterprise Linux Eus8.4
RedhatEnterprise Linux For Ibm Z Systems7.0
RedhatEnterprise Linux For Ibm Z Systems8.0
RedhatEnterprise Linux For Ibm Z Systems Eus8.2
RedhatEnterprise Linux For Ibm Z Systems Eus8.4
RedhatEnterprise Linux For Power Big Endian7.0
RedhatEnterprise Linux For Power Little Endian7.0
RedhatEnterprise Linux For Power Little Endian8.0
RedhatEnterprise Linux For Power Little Endian Eus8.2
RedhatEnterprise Linux For Power Little Endian Eus8.4
RedhatEnterprise Linux For Scientific Computing7.0
RedhatEnterprise Linux Server Aus8.2
RedhatEnterprise Linux Server Aus8.4
RedhatEnterprise Linux Server Tus8.2
RedhatEnterprise Linux Server Tus8.4
RedhatEnterprise Linux Server Update Services For Sap Solutions8.2
RedhatEnterprise Linux Server Update Services For Sap Solutions8.4
RedhatEnterprise Linux Workstation7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-25719?
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.
How severe is CVE-2020-25719?
CVE-2020-25719 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.67% probability of exploitation in the next 30 days.
How do I fix CVE-2020-25719?
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-2020-25719?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST