CVE-2016-0772 (GCVE-0-2016-0772)
Vulnerability from cvelistv5 – Published: 2016-09-02 14:00 – Updated: 2024-08-05 22:30
VLAI
EPSS
VEX
Summary
The smtplib library in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."
Severity
6.5 (Medium)
CWE
- n/a
Assigner
References
18 references
Date Public
2016-06-11 00:00
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"lastModified": "2024-11-21T02:42:21.070",
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"vulnStatus": "Modified",
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},
"nvd": "{\"cve\":{\"id\":\"CVE-2016-0772\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2016-09-02T14:59:00.127\",\"lastModified\":\"2026-05-06T22:30:45.220\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The smtplib library in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \\\"StartTLS stripping attack.\\\"\"},{\"lang\":\"es\",\"value\":\"La librer\u00eda smtplib en CPython (tambi\u00e9n conocido como Python) en versiones anteriores a 2.7.12, 3.x en versiones anteriores a 3.4.5 y 3.5.x en versiones anteriores a 3.5.2 no devuelve un error cuando StartTLS falla, lo que podr\u00eda permitir a atacantes man-in-the-middle eludir las protecciones TLS mediante el aprovechamiento 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T10:59:59+00:00",
"cve": "CVE-2016-0772",
"id": "CVE-2016-0772",
"initial_release_date": "2016-06-11T00:00:00+00:00",
"product_status:fixed": "416",
"product_status:known_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "python: smtplib StartTLS stripping attack",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-0772.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-01T02:22:36Z",
"cve": "CVE-2016-0772",
"id": "CVE-2016-0772",
"initial_release_date": "2023-02-15T05:09:12Z",
"product_status:known_affected": "320",
"product_status:known_not_affected": "465",
"product_status:recommended": "1444",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2016-0772",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-0772.json",
"version": "55"
}
}
}
Loading…
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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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