NVD - CVE-2017-11103

CVE-2017-11103 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Current Description

Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.

Source: MITRE
Description Last Modified: 07/13/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.1 HIGH
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 2.2

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 6.8 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://www.debian.org/security/2017/dsa-3912
http://www.h5l.org/advisories.html?show=2017-07-11	Vendor Advisory
http://www.securityfocus.com/bid/99551	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038876	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039427
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0	Vendor Advisory
https://support.apple.com/HT208112
https://support.apple.com/HT208144
https://support.apple.com/HT208221
https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc	Third Party Advisory
https://www.orpheus-lyre.info/	Third Party Advisory
https://www.samba.org/samba/security/CVE-2017-11103.html	Third Party Advisory

Technical Details

Vulnerability Type (View All)

Insufficient Verification of Data Authenticity (CWE-345)

Vulnerable software and versions Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

6 change records found - show changes

Initial Analysis - 7/21/2017 2:19:04 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 5710 characters. View Entire Change Record AND OR cpe:2.3:a:samba:samba:4.0.0::::::: cpe:2.3:a:samba:samba:4.0.1::::::: cpe:2.3:a:samba:samba:4.0.2::::::: cpe:2.3:a:samba:samba:4.0.3::::::: cpe:2.3:a:samba:samba:4.0.4::::::: cpe:2.3:a:samba:samba:4.0.5::::::: cpe:2.3:a:samba:samba:4.0.6::::::: cpe:2.3:a:samba:samba:4.0.7::::::: cpe:2.3:a:samba:samba:4.0.8::::::: *
Added	CPE Configuration		Record truncated, showing 500 of 901 characters. View Entire Change Record OR cpe:2.3:a:h5l:heimdal:0.0a::::::: cpe:2.3:a:h5l:heimdal:0.8::::::: cpe:2.3:a:h5l:heimdal:1.0::::::: cpe:2.3:a:h5l:heimdal:1.0.1::::::: cpe:2.3:a:h5l:heimdal:1.0.2::::::: cpe:2.3:a:h5l:heimdal:1.1::::::: cpe:2.3:a:h5l:heimdal:1.2::::::: cpe:2.3:a:h5l:heimdal:1.2.1::::::: cpe:2.3:a:h5l:heimdal:1.3.0::::::: cpe:2.3:a:h5l:heimdal:1.3.1::::::: *cpe:2.3:a:h5l:heimda
Added	CPE Configuration		OR cpe:2.3:o:freebsd:freebsd:-:::::::
Added	CVSS V2		(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Added	CVSS V3		AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CWE		CWE-345
Changed	Reference Type	http://www.h5l.org/advisories.html?show=2017-07-11 No Types Assigned	http://www.h5l.org/advisories.html?show=2017-07-11 Vendor Advisory
Changed	Reference Type	http://www.securityfocus.com/bid/99551 No Types Assigned	http://www.securityfocus.com/bid/99551 Third Party Advisory, VDB Entry
Changed	Reference Type	http://www.securitytracker.com/id/1038876 No Types Assigned	http://www.securitytracker.com/id/1038876 Third Party Advisory, VDB Entry
Changed	Reference Type	https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0 No Types Assigned	https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0 Vendor Advisory
Changed	Reference Type	https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc No Types Assigned	https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc Third Party Advisory
Changed	Reference Type	https://www.orpheus-lyre.info/ No Types Assigned	https://www.orpheus-lyre.info/ Third Party Advisory
Changed	Reference Type	https://www.samba.org/samba/security/CVE-2017-11103.html No Types Assigned	https://www.samba.org/samba/security/CVE-2017-11103.html Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2017-11103
NVD Published Date:
07/13/2017
NVD Last Modified:
11/13/2017

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National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-11103 Detail

Current Description

Analysis Description

Impact

References to Advisories, Solutions, and Tools

Technical Details

Vulnerable software and versions Switch to CPE 2.2

Change History

CVE Modified by MITRE - 11/13/2017 9:29:00 PM

CVE Modified by MITRE - 11/3/2017 9:29:33 PM

CVE Modified by MITRE - 10/23/2017 9:29:01 PM

CVE Modified by MITRE - 9/26/2017 9:29:01 PM

Initial Analysis - 7/21/2017 2:19:04 PM

CVE Modified by MITRE - 7/17/2017 9:18:18 AM

Quick Info