CVE-2020-24386 (GCVE-0-2020-24386)
Vulnerability from cvelistv5 – Published: 2021-01-04 16:25 – Updated: 2024-08-04 15:12
VLAI
EPSS
VEX
Summary
An issue was discovered in Dovecot before 2.3.13. By using IMAP IDLE, an authenticated attacker can trigger unhibernation via attacker-controlled parameters, leading to access to other users' email messages (and path disclosure).
Severity
6.8 (Medium)
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://dovecot.org/security | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2021/01/04/4 | x_refsource_CONFIRM |
| https://dovecot.org/pipermail/dovecot-news/2021-J… | x_refsource_CONFIRM |
| https://doc.dovecot.org/configuration_manual/hibe… | x_refsource_MISC |
| https://www.debian.org/security/2021/dsa-4825 | vendor-advisoryx_refsource_DEBIAN |
| http://seclists.org/fulldisclosure/2021/Jan/18 | mailing-listx_refsource_FULLDISC |
| http://packetstormsecurity.com/files/160842/Dovec… | x_refsource_MISC |
| https://security.gentoo.org/glsa/202101-01 | vendor-advisoryx_refsource_GENTOO |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
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"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GXDKFLOCUP7I4ELGQ2F4P5TGC6NXMYV7/"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202101-01"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4825"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/160842/Dovecot-2.3.11.3-Access-Bypass.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://seclists.org/fulldisclosure/2021/Jan/18"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2021/01/04/4"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://doc.dovecot.org/configuration_manual/hibernation/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Vendor Advisory"
],
"url": "https://dovecot.org/pipermail/dovecot-news/2021-January/000450.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://dovecot.org/security"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GXDKFLOCUP7I4ELGQ2F4P5TGC6NXMYV7/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202101-01"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4825"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T16:17:16+00:00",
"cve": "CVE-2020-24386",
"id": "CVE-2020-24386",
"initial_release_date": "2020-01-01T00:00:00+00:00",
"product_status:fixed": "96",
"product_status:known_affected": "19",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "dovecot: IMAP hibernation function allows mail access",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-24386.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-13T23:59:07Z",
"cve": "CVE-2020-24386",
"id": "CVE-2020-24386",
"initial_release_date": "2023-02-15T03:54:28Z",
"product_status:recommended": "573",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-24386",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-24386.json",
"version": "21"
}
}
}
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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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