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LIN9-5144 : Security Advisory - samba - CVE-2017-11103

Created: Aug 28, 2017    Updated: Dec 3, 2018
Resolved Date: Sep 26, 2017
Found In Version: 9.0.0.9
Fix Version: 9.0.0.11
Severity: Standard
Applicable for: Wind River Linux 9
Component/s: Userspace

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.

https://nvd.nist.gov/vuln/detail/CVE-2017-11103

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