BlackTreeCVE Intelligence
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Full vulnerability report · 2017
CVE-2017-11103High confidence

Affected product: Insufficient Verification of Data Authenticity

Unknown · Unknown

8.1HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 5.12% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Alpine, Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

11 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · mainheimdalVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.7.4.0-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainheimdalVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.7.4.0-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainheimdalVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.7.4.0-r0Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourceheimdalVendor fix publishedDebian records a fixed source-package version for this release.7.4.0.dfsg.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian trixietrixie · sourcesambaVendor fix publishedDebian records a fixed source-package version for this release.2:4.6.5+dfsg-4Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourceheimdalVendor fix publishedDebian records a fixed source-package version for this release.7.4.0.dfsg.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcesambaVendor fix publishedDebian records a fixed source-package version for this release.2:4.6.5+dfsg-4Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourceheimdalVendor fix publishedDebian records a fixed source-package version for this release.7.4.0.dfsg.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcesambaVendor fix publishedDebian records a fixed source-package version for this release.2:4.6.5+dfsg-4Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourceheimdalVendor fix publishedDebian records a fixed source-package version for this release.7.4.0.dfsg.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcesambaVendor fix publishedDebian records a fixed source-package version for this release.2:4.6.5+dfsg-4Debian Security Tracker ↗Source updated 5 Oct 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2017-2740

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

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.

What

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.

Why

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Insufficient Verification of Data Authenticity → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-345 ↗

CWE-345: Insufficient Verification of Data Authenticity. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-345
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2025-0370Apple Mac OS: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstelle in Apple Mac OS ausnutzen, um Code mit Kernel Privilegien auszuführen, Sicherheitsvorkehrungen zu umgehen, einen Denial of Service Angriff durchzuführen oder vertrauliche Daten einzusehen.

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-161Apple security updates

ry is to bring attention to multiple Apple system security updates for iCloud for Windows, iOS, iTunes for Windows, macOS High Sierra, macOS Sierra, macOS El Capitan, Safari, tvOS and watchOS. Assessment Apple has released the following support articles addressing security vulnerabilities in various products: -iCloud for Windows 7.1 -iOS 11.1 -iTunes 12.7.1 for Windows -macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan -Safari 11.1 -tvOS 11.1 -watchOS 4.1 CVE Reference: CVE-2016-2161, CVE-2016-4736, CVE-2016-5387, CVE-2016-736, CVE-2016-8740, CVE-2016-8743, CVE-2017-1000100, CVE-2017-1000101, CVE-2017-11103, CVE-2017-11108, CVE-2017-11541, CVE-2017-11542, CVE-2017-11543, CVE-2017-12893, CVE-2017-12894, CVE-2017-12895, CVE-2017-12896, CVE-2017-12897, CVE-2017-12898, CVE-2017-12899, CVE-2017-12900, CVE-2017-12901, CVE-2017-12902, CVE-2017-12985, CVE-2017-12986, CVE-2017-12987, CVE-2017-12988, CVE-2017-12989, CVE-2017-12990, CVE-2017-12991, CVE-2017-12992, CVE-2017-12993, CVE-2017-12994, CVE-2017-12995, CVE-2017-12996, CVE-2017-12997, CVE-2017-12998, CVE-2017-12999, CVE-2017-13000, CVE-2017-13001, CVE-2017-13002, CVE-2017-13003, CVE-2017-13004, CVE-2017-13005, CVE-2017-13006, CVE-2017-13007, CVE-2017-13008, CVE-2017-13009, CVE-2017-13010, CVE-2017

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-143Apple security updates

, CVE-2017-7077, CVE-2017-7078, CVE-2017-7081, CVE-2017-7082, CVE-2017-7083, CVE-2017-7084, CVE-2017-7087, CVE-2017-7090, CVE-2017-7091, CVE-2017-7093, CVE-2017-7094, CVE-2017-7095, CVE-2017-7096, CVE-2017-7097, CVE-2017-7098, CVE-2017-7099, CVE-2017-7100, CVE-2017-7102, CVE-2017-7104, CVE-2017-7106, CVE-2017-7107, CVE-2017-7109, CVE-2017-7111, CVE-2017-7114; CVE-2017-7086, CVE-2017-7117, CVE-2017-7119, CVE-2017-7120, CVE-2017-7121, CVE-2017-7122, CVE-2017-7123, CVE-2017-7124, CVE-2017-7125, CVE-2017-7126, CVE-2017-7127, CVE-2017-7128, CVE-2017-7129, CVE-2017-7141, CVE-2017-7143, CVE-2017-9233, CVE-2017-10978, CVE-2017-10979, CVE-2017-10989, CVE-2017-11103, CVE-2017-1000373 Suggested Action CCIRC recommends that owner/operators test and deploy the vendor released updates or workarounds to affected platforms. References: https://support.apple.com/en-us/HT208142 https://support.apple.com/en-us/HT208144 https://support.apple.com/en-us/HT208102

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-102Samba security update

Samba has released a security patch in Samba versions: 4.6.6, 4.5.12 and 4.4.15 to correct the security issue.  Exploitation of this vulnerability could allow a MITM (Man in the Middle) attacker to impersonate a trusted server and gain elevated access to the domain. Affected Versions: All versions of Samba from 4.0.0 onward using embedded Heimdal Kerberos. Not Affected Versions: Samba versions 4.6.6, 4.5.12 and 4.4.15 CVE Reference: CVE-2017-11103 Special consideration and review should be conducted for internet connected devices which may be leveraging vulnerable versions of Samba, including but not limited to: DVRs, routers and IP cameras. These types of devices typically can only be updated via vendor released firmware updates.

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-385Multiples vulnérabilités dans les produits Apple

24 Bulletin de sécurité Apple HT208225 du 31 octobre 2017 https://support.apple.com/en-us/HT208225 Référence CVE CVE-2016-2161 https://www.cve.org/CVERecord?id=CVE-2016-2161 Référence CVE CVE-2016-4736 https://www.cve.org/CVERecord?id=CVE-2016-4736 Référence CVE CVE-2016-5387 https://www.cve.org/CVERecord?id=CVE-2016-5387 Référence CVE CVE-2016-8740 https://www.cve.org/CVERecord?id=CVE-2016-8740 Référence CVE CVE-2016-8743 https://www.cve.org/CVERecord?id=CVE-2016-8743 Référence CVE CVE-2017-1000100 https://www.cve.org/CVERecord?id=CVE-2017-1000100 Référence CVE CVE-2017-1000101 https://www.cve.org/CVERecord?id=CVE-2017-1000101 Référence CVE CVE-2017-11103 https://www.cve.org/CVERecord?id=CVE-2017-11103 Référence CVE CVE-2017-11108 https://www.cve.org/CVERecord?id=CVE-2017-11108 Référence CVE CVE-2017-11541 https://www.cve.org/CVERecord?id=CVE-2017-11541 Référence CVE CVE-2017-11542 https://www.cve.org/CVERecord?id=CVE-2017-11542 Référence CVE CVE-2017-11543 https://www.cve.org/CVERecord?id=CVE-2017-11543 Référence CVE CVE-2017-12893 https://www.cve.org/CVERecord?id=CVE-2017-12893 Référence CVE CVE-2017-12894 https://www.cve.org/CVERecord?id=CVE-2017-12894 Référence CVE CVE-2017-12895 https://www.cve.org/CVERecord?id=CVE-2017-12895 Référence CVE CVE-2017-12896 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-320Multiples vulnérabilités dans les produits Apple

Record?id=CVE-2016-9840 Référence CVE CVE-2016-9841 https://www.cve.org/CVERecord?id=CVE-2016-9841 Référence CVE CVE-2016-9842 https://www.cve.org/CVERecord?id=CVE-2016-9842 Référence CVE CVE-2016-9843 https://www.cve.org/CVERecord?id=CVE-2016-9843 Référence CVE CVE-2017-0381 https://www.cve.org/CVERecord?id=CVE-2017-0381 Référence CVE CVE-2017-1000373 https://www.cve.org/CVERecord?id=CVE-2017-1000373 Référence CVE CVE-2017-10978 https://www.cve.org/CVERecord?id=CVE-2017-10978 Référence CVE CVE-2017-10979 https://www.cve.org/CVERecord?id=CVE-2017-10979 Référence CVE CVE-2017-10989 https://www.cve.org/CVERecord?id=CVE-2017-10989 Référence CVE CVE-2017-11103 https://www.cve.org/CVERecord?id=CVE-2017-11103 Référence CVE CVE-2017-6451 https://www.cve.org/CVERecord?id=CVE-2017-6451 Référence CVE CVE-2017-6452 https://www.cve.org/CVERecord?id=CVE-2017-6452 Référence CVE CVE-2017-6455 https://www.cve.org/CVERecord?id=CVE-2017-6455 Référence CVE CVE-2017-6458 https://www.cve.org/CVERecord?id=CVE-2017-6458 Référence CVE CVE-2017-6459 https://www.cve.org/CVERecord?id=CVE-2017-6459 Référence CVE CVE-2017-6460 https://www.cve.org/CVERecord?id=CVE-2017-6460 Référence CVE CVE-2017-6462 https://www.cve.org/CVERecord?id=CVE-2017-6462 Référence CVE CVE-2017-6463 https://www.cve.org/CVERecord?id=CVE-2017-6463 R

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-214Vulnérabilité dans Samba

Une vulnérabilité a été corrigée dans Samba . Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-005901Heimdal におけるサービスを偽装される脆弱性

Heimdal は、オルフェウスの竪琴 (Orpheus' Lyre) 攻撃により、Kerberos 5 プロトコルの仕様に違反する方法でサービスプリンシパル名を取得するため、サービスを偽装される脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
n/a
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 13 Jul 2017 · Last source change 5 Aug 2024, 17:57 UTC · CWE-345 · Insufficient Verification of Data Authenticity

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2017-2740
Product sourceUnavailable
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2017-2740 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2017-2740"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: removed vendor advisory: debian.org/dsa-3912; removed vendor advisory: freebsd.org/FreeBSD-SA-17:05.heimdal.asc.
    Before
    vendor advisory: debian.org/dsa-3912 · vendor advisory: freebsd.org/FreeBSD-SA-17:05.heimdal.asc
    After
    no authoritative guidance recorded
    CNA ↗
  3. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  4. CVSS scoreCVSS score changed from not recorded to 8.1 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
    Before
    not recorded
    After
    8.1 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
    NIST NVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2017-2740↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2017-11103 · cve.blacktree.nl