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CVE-2017-11103

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…

Impact

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.

Affected products

VendorProductAffected versions
Heimdal ProjectHeimdal
before 7.4.0
FreebsdFreebsd
All versions
SambaSamba
from 4.0.0 before 4.4.15
from 4.5.0 before 4.5.12
from 4.6.0 before 4.6.6
AppleIphone Os
before 11.0
AppleMac Os X
before 10.13.1
DebianDebian Linux
Versions 8.0, 9.0, 10.0

Weakness classification

CWE-345

References