ubuntu-cve-2020-25657
Vulnerability from osv_ubuntu
Published
2021-01-12 15:15
Modified
2026-05-20 14:52
Summary
Details
A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.
Severity
5.9 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-m2crypto",
"binary_version": "0.21.1-3ubuntu5"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.21.1-3ubuntu5?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.21.1-3ubuntu3",
"0.21.1-3ubuntu4",
"0.21.1-3ubuntu5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-m2crypto",
"binary_version": "0.22.6~rc4-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.22.6~rc4-1ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.21.1-3ubuntu5",
"0.22.6~rc4-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-m2crypto",
"binary_version": "0.27.0-5"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.27.0-5?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.24.0-2",
"0.27.0-2",
"0.27.0-4",
"0.27.0-4build1",
"0.27.0-5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-m2crypto",
"binary_version": "0.31.0-9ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.31.0-9ubuntu1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.31.0-6",
"0.31.0-6build1",
"0.31.0-7",
"0.31.0-8",
"0.31.0-9ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-m2crypto",
"binary_version": "0.38.0-1ubuntu5"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.38.0-1ubuntu5?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.37.1-1ubuntu3",
"0.37.1-1ubuntu4",
"0.38.0-1ubuntu3",
"0.38.0-1ubuntu5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-m2crypto",
"binary_version": "0.40.1-2ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.40.1-2ubuntu1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.38.0-4build1",
"0.38.0-4.1",
"0.40.1-0ubuntu1",
"0.40.1-1",
"0.40.1-2build1",
"0.40.1-2build2",
"0.40.1-2ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-m2crypto",
"binary_version": "0.42.0-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.42.0-3?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.42.0-2.1build1",
"0.42.0-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-m2crypto",
"binary_version": "0.46.2-3build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "m2crypto",
"purl": "pkg:deb/ubuntu/m2crypto@0.46.2-3build1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.42.0-3",
"0.46.2-2",
"0.46.2-3",
"0.46.2-3build1"
]
}
],
"aliases": [],
"details": "A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.",
"id": "UBUNTU-CVE-2020-25657",
"modified": "2026-05-20T14:52:25Z",
"published": "2021-01-12T15:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25657"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1889823"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-25657"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-25657"
]
}
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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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