CVE-2022-3786 (GCVE-0-2022-3786)
Vulnerability from cvelistv5 – Published: 2022-11-01 00:00 – Updated: 2026-04-14 08:58
VLAI
EPSS
VEX
Title
X.509 Email Address Variable Length Buffer Overflow
Summary
A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:26 UTC
CWE
- Buffer overflow
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
Impacted products
10 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| OpenSSL | OpenSSL |
Affected:
3.0.0 , < 3.0.7
(semver)
|
guessed | |
| Siemens | Calibre ICE |
Affected:
V2022.4 , < V2023.1
(custom)
|
guessed | |
| Siemens | Mcenter |
Affected:
V5.2.1 , < V5.3.0
(custom)
|
guessed | |
| Siemens | SCALANCE X204RNA (HSR) |
Affected:
V3.2.7 , < V3.2.8
(custom)
|
guessed | |
| Siemens | SCALANCE X204RNA (PRP) |
Affected:
V3.2.7 , < V3.2.8
(custom)
|
guessed | |
| Siemens | SCALANCE X204RNA EEC (HSR) |
Affected:
V3.2.7 , < V3.2.8
(custom)
|
guessed | |
| Siemens | SCALANCE X204RNA EEC (PRP) |
Affected:
V3.2.7 , < V3.2.8
(custom)
|
guessed | |
| Siemens | SCALANCE X204RNA EEC (PRP/HSR) |
Affected:
V3.2.7 , < V3.2.8
(custom)
|
guessed | |
| Siemens | SICAM GridPass |
Affected:
V1.80 , < V2.20
(custom)
|
guessed | |
| Siemens | SIMATIC RTLS Locating Manager |
Affected:
V2.13.0.0 , < V2.13.0.3
(custom)
|
guessed |
Date Public
2022-11-01 00:00
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"lang": "es",
"value": "Puede activarse una saturaci\u00f3n del b\u00fafer en la verificaci\u00f3n del certificado X.509, espec\u00edficamente en la verificaci\u00f3n de restricciones del nombre. Tenga en cuenta que esto ocurre despu\u00e9s de la verificaci\u00f3n de la firma de la cadena de certificados y requiere que una CA haya firmado un certificado malicioso o que la aplicaci\u00f3n contin\u00fae con la verificaci\u00f3n del certificado a pesar de no poder construir una ruta hacia un emisor confiable. Un atacante puede crear una direcci\u00f3n de correo electr\u00f3nico maliciosa en un certificado para desbordar una cantidad arbitraria de bytes que contengan el car\u00e1cter \".\" (decimal 46) en la pila de memoria. Este desbordamiento del b\u00fafer podr\u00eda provocar un bloqueo (provocando una denegaci\u00f3n de servicio). En un cliente TLS, esto se puede desencadenar conect\u00e1ndose a un servidor malicioso. En un servidor TLS, esto puede activarse si el servidor solicita la autenticaci\u00f3n del cliente y se conecta un cliente malicioso."
}
],
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}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.