Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in
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.
- Published
- Jul 13, 2017
- Updated
- Jun 16, 2026
- EPSS
- 5.1% · 92th percentile
- CWE
- CWE-345
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Report tools
Action score
34
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 5.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| heimdal project | heimdal | cpe:2.3:a:heimdal_project:heimdal |
| freebsd | freebsd | cpe:2.3:o:freebsd:freebsd |
| samba | samba | cpe:2.3:a:samba:samba |
| apple | iphone os | cpe:2.3:o:apple:iphone_os |
| apple | mac os x | cpe:2.3:o:apple:mac_os_x |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apple iphone osbefore 11.0
- apple mac os xbefore 10.13.1
- debian debian linux10.0
- debian debian linux8.0
- debian debian linux9.0
- freebsd freebsdall versions
- heimdal project heimdalbefore 7.4.0
- samba samba4.5.0 and later · before 4.5.12
- samba samba4.0.0 and later · before 4.4.15
- samba samba4.6.0 and later · before 4.6.6
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.10 | heimdal | before 7.4.0-r0 | 7.4.0-r0 |
| Alpine:v3.3 | heimdal | before 1.6_rc2-r5 | 1.6_rc2-r5 |
| Alpine:v3.3 | samba | from 4.0.0 · before 4.2.14-r4 | 4.2.14-r4 |
| Alpine:v3.4 | samba | from 4.0.0 · before 4.4.14-r1 | 4.4.14-r1 |
| Alpine:v3.5 | heimdal | before 1.6_rc2-r6 | 1.6_rc2-r6 |
| Alpine:v3.5 | samba | from 4.0.0 · before 4.5.10-r1 | 4.5.10-r1 |
| Alpine:v3.6 | heimdal | before 7.1.0-r1 | 7.1.0-r1 |
| Alpine:v3.6 | samba | from 4.0.0 · before 4.6.4-r1 | 4.6.4-r1 |
| Debian:12 | heimdal | before 7.4.0.dfsg.1-1 | 7.4.0.dfsg.1-1 |
| Debian:12 | samba | before 2:4.6.5+dfsg-4 | 2:4.6.5+dfsg-4 |
| Debian:7 | heimdal | before 1.6~git20120403+dfsg1-2+deb7u1 | 1.6~git20120403+dfsg1-2+deb7u1 |
| Debian:8 | heimdal | before 1.6~rc2+dfsg-9+deb8u1 | 1.6~rc2+dfsg-9+deb8u1 |
| Debian:8 | samba | before 2:4.2.14+dfsg-0+deb8u7 | 2:4.2.14+dfsg-0+deb8u7 |
| Debian:9 | heimdal | before 7.1.0+dfsg-13+deb9u1 | 7.1.0+dfsg-13+deb9u1 |
| Debian:9 | samba | before 2:4.5.8+dfsg-2+deb9u1 | 2:4.5.8+dfsg-2+deb9u1 |
| openSUSE:Tumbleweed | samba | before 4.14.6+git.182.2205d5224e3-1.1 | 4.14.6+git.182.2205d5224e3-1.1 |
| SUSE:Linux Enterprise Desktop 12 SP3 | samba | before 4.6.7+git.38.90b2cdb4f22-3.7.1 | 4.6.7+git.38.90b2cdb4f22-3.7.1 |
| SUSE:Linux Enterprise High Availability Extension 12 SP3 | resource-agents | before 4.0.1+git.1495055229.643177f1-2.4.2 | 4.0.1+git.1495055229.643177f1-2.4.2 |
Same product
heimdal project: all recordsOther highest-scoring records for the same primary product.
- CVE-2004-0434k5admind (kadmind) for Heimdal allows remote attackers to execute arbitrary code via a Kerberos 4 compatibility administration request whose41Plan
- CVE-2022-44640Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distrib40Plan
- CVE-2017-6594The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy protection mechanism by leveraging 31Monitor
- CVE-2022-3116The Heimdal Software Kerberos 5 implementation is vulnerable to a null pointer dereferance.30Monitor
- CVE-2022-45142The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding "!= 0" comparisons to t30Monitor
- CVE-2021-44758Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a preferred_mech_type of GSS_C_NO_OID and30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:heimdal | 7.4.0-r0 · Alpine:v3.10 | Package registry (OSV) |
| alpine:samba | 4.2.14-r4 · Alpine:v3.3 | Package registry (OSV) |
| debian:heimdal | 7.4.0.dfsg.1-1 · Debian:12 | Package registry (OSV) |
| debian:samba | 2:4.6.5+dfsg-4 · Debian:12 | Package registry (OSV) |
| opensuse:samba | 4.14.6+git.182.2205d5224e3-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:resource-agents | 4.0.1+git.1495055229.643177f1-2.4.2 · SUSE:Linux Enterprise High Availability Extension 12 SP3 | Package registry (OSV) |
| suse:samba | 4.6.7+git.38.90b2cdb4f22-3.7.1 · SUSE:Linux Enterprise Desktop 12 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-345 · Insufficient Verification of Data AuthenticityCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- JSON Hijacking (aka JavaScript Hijacking)CAPEC-111likelihood: High · High
- Cache PoisoningCAPEC-141likelihood: High · High
- DNS Cache PoisoningCAPEC-142likelihood: High · High
- Content SpoofingCAPEC-148likelihood: Medium · Medium
- Spoofing of UDDI/ebXML MessagesCAPEC-218Medium
- Application API Message Manipulation via Man-in-the-MiddleCAPEC-384Low
- Transaction or Event Tampering via Application API ManipulationCAPEC-385Medium
- Application API Navigation RemappingCAPEC-386Medium
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.debian.org/security/2017/dsa-3912
- www.h5l.org/advisories.html?show=2017-07-11
- www.securityfocus.com/bid/99551
- www.securitytracker.com/id/1038876
- www.securitytracker.com/id/1039427
- github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0
- support.apple.com/HT208112
- support.apple.com/HT208144
- support.apple.com/HT208221
- www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc
- www.orpheus-lyre.info/
- www.samba.org/samba/security/CVE-2017-11103.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.