CVE-2017-11103 (GCVE-0-2017-11103)
Vulnerability from cvelistv5 – Published: 2017-07-13 13:00 – Updated: 2024-08-05 17:57
VLAI
EPSS
VEX
Summary
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.
Severity
8.1 (High)
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://support.apple.com/HT208221 | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3912 | vendor-advisoryx_refsource_DEBIAN |
| https://support.apple.com/HT208144 | x_refsource_CONFIRM |
| https://www.orpheus-lyre.info/ | x_refsource_MISC |
| https://www.freebsd.org/security/advisories/FreeB… | vendor-advisoryx_refsource_FREEBSD |
| http://www.securityfocus.com/bid/99551 | vdb-entryx_refsource_BID |
| http://www.securitytracker.com/id/1039427 | vdb-entryx_refsource_SECTRACK |
| https://www.samba.org/samba/security/CVE-2017-111… | x_refsource_CONFIRM |
| http://www.securitytracker.com/id/1038876 | vdb-entryx_refsource_SECTRACK |
| https://support.apple.com/HT208112 | x_refsource_CONFIRM |
| https://github.com/heimdal/heimdal/releases/tag/h… | x_refsource_CONFIRM |
| http://www.h5l.org/advisories.html?show=2017-07-11 | x_refsource_CONFIRM |
Date Public
2017-07-13 00:00
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"aggregate_severity": "Important",
"current_release_date": "2026-08-04T18:40:35+00:00",
"cve": "CVE-2017-11103",
"id": "CVE-2017-11103",
"initial_release_date": "2017-07-11T00:00:00+00:00",
"product_status:known_not_affected": "115",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "krb5: Metadata taken from the unauthenticated plaintext",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-11103.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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