CVE-2017-17688 (GCVE-0-2017-17688)
Vulnerability from cvelistv5 – Published: 2018-05-16 19:00 – Updated: 2024-08-05 20:59 Disputed
VLAI
EPSS
VEX
Summary
The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification
Severity
5.9 (Medium)
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://protonmail.com/blog/pgp-vulnerability-efail | x_refsource_MISC |
| https://news.ycombinator.com/item?id=17066419 | x_refsource_MISC |
| https://www.patreon.com/posts/cybersecurity-15-18814817 | x_refsource_MISC |
| http://flaked.sockpuppet.org/2018/05/16/a-unified… | x_refsource_MISC |
| http://www.securityfocus.com/bid/104162 | vdb-entryx_refsource_BID |
| https://lists.gnupg.org/pipermail/gnupg-users/201… | x_refsource_MISC |
| https://efail.de | x_refsource_MISC |
| https://twitter.com/matthew_d_green/status/995996… | x_refsource_MISC |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.securitytracker.com/id/1040904 | vdb-entryx_refsource_SECTRACK |
Date Public
2018-05-16 00:00
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"value": "The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification"
},
{
"lang": "es",
"value": "** EN DISPUTA ** La especificaci\u00f3n OpenPGP permite un ataque malleability-gadget Cipher Feedback Mode (CFB) que puede conducir indirectamente a la exfiltraci\u00f3n en texto plano. Esto tambi\u00e9n se conoce como EFAIL. NOTA: terceros indican que este es un problema en aplicaciones que gestionan de manera incorrecta la caracter\u00edstica de Modification Detection Code (MDC) o que afectan un tipo de paquete obsoleto, en lugar de un problema en la especificaci\u00f3n OpenPGP."
}
],
"id": "CVE-2017-17688",
"lastModified": "2024-11-21T03:18:27.723",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.0"
},
"exploitabilityScore": 2.2,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2018-05-16T19:29:00.223",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/104162"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1040904"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Mitigation",
"Third Party Advisory"
],
"url": "https://efail.de"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://news.ycombinator.com/item?id=17066419"
},
{
"source": "cve@mitre.org",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://protonmail.com/blog/pgp-vulnerability-efail"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://twitter.com/matthew_d_green/status/995996706457243648"
},
{
"source": "cve@mitre.org",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://www.patreon.com/posts/cybersecurity-15-18814817"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.synology.com/support/security/Synology_SA_18_22"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/104162"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1040904"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Mitigation",
"Third Party Advisory"
],
"url": "https://efail.de"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://news.ycombinator.com/item?id=17066419"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://protonmail.com/blog/pgp-vulnerability-efail"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://twitter.com/matthew_d_green/status/995996706457243648"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://www.patreon.com/posts/cybersecurity-15-18814817"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.synology.com/support/security/Synology_SA_18_22"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T16:40:18+00:00",
"cve": "CVE-2017-17688",
"id": "CVE-2017-17688",
"initial_release_date": "2017-01-01T00:00:00+00:00",
"product_status:known_not_affected": "12",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "OpenPGP: CFB gadget attacks allows to exfiltrate plaintext out of encrypted emails",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-17688.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-03T00:57:36Z",
"cve": "CVE-2017-17688",
"id": "CVE-2017-17688",
"initial_release_date": "2023-02-15T04:36:38Z",
"product_status:known_not_affected": "232",
"product_status:recommended": "23",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2017-17688",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2017-17688.json",
"version": "15"
}
}
}
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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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