Vulnerability Report

CVE-2020-17049

Title: KDC Security Feature Bypass Vulnerability

Security Feature Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2020-17049.

CWE Category CWE-863
Published Date Nov 11, 2020
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 6.6 CVSS v3.1
Exploit Probability (EPSS)
13.79%

Vulnerability Summary

CVE-2020-17049: A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD). To exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it. The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.

Impacted Vendors

S
samba 1
S
sgi 1

Reference Links

http://www.openwall.com/lists/oss-security/2021/11/10/3 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049 https://security.gentoo.org/glsa/202309-06 http://www.openwall.com/lists/oss-security/2021/11/10/3 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049 https://security.gentoo.org/glsa/202309-06
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.6
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.2
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
9.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:S/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-17049 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.