Home/CVE/Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service
CVE

CVE-2017-11103

Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service

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.

HIGH · CVSS 8.1 EPSS 0.05637
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-345Insufficient Verification of Data Authenticity
▤

Affected Products & Versions

8
heimdal project heimdal< 7.4.0
freebsdall versions
samba>= 4.0.0 and < 4.4.15
samba>= 4.5.0 and < 4.5.12
samba>= 4.6.0 and < 4.6.6
apple iphone os< 11.0
apple mac os x< 10.13.1
debian linuxall versions
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jul 2017 · 01:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

7
suse-csafopenSUSE-SU-2024:10946-1
suse-csafopenSUSE-SU-2024:11365-1
suse-csafSUSE-SU-2017:2237-1
usnUSN-3353-4
usnUSN-3353-3
🔗

References & Sources

12
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.debian.org/security/2017/dsa-3912Third Party Advisory
http://www.h5l.org/advisories.html?show=2017-07-11Broken Link
http://www.securityfocus.com/bid/99551Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038876Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039427Third Party AdvisoryVDB Entry
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0Release Notes
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