UBUNTU-CVE-2021-27378

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Source
https://ubuntu.com/security/CVE-2021-27378
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27378.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-27378
Upstream
Published
2021-02-18T04:15:00Z
Modified
2025-10-24T04:50:12Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in the randcore crate before 0.6.2 for Rust. Because readu32into and readu64_into mishandle certain buffer-length checks, a random number generator may be seeded with too little data.

References

Affected packages

Ubuntu:20.04:LTS / rust-rand-core

Package

Name
rust-rand-core
Purl
pkg:deb/ubuntu/rust-rand-core@0.5.1-1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.3.0-1
0.5.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.5.1-1",
            "binary_name": "librust-rand-core+getrandom-dev"
        },
        {
            "binary_version": "0.5.1-1",
            "binary_name": "librust-rand-core+serde-dev"
        },
        {
            "binary_version": "0.5.1-1",
            "binary_name": "librust-rand-core+std-dev"
        },
        {
            "binary_version": "0.5.1-1",
            "binary_name": "librust-rand-core-dev"
        }
    ]
}

Ubuntu:22.04:LTS / rust-rand-core

Package

Name
rust-rand-core
Purl
pkg:deb/ubuntu/rust-rand-core@0.6.3-2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.5.1-1
0.6.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.6.3-2",
            "binary_name": "librust-rand-core+getrandom-dev"
        },
        {
            "binary_version": "0.6.3-2",
            "binary_name": "librust-rand-core+serde-dev"
        },
        {
            "binary_version": "0.6.3-2",
            "binary_name": "librust-rand-core+std-dev"
        },
        {
            "binary_version": "0.6.3-2",
            "binary_name": "librust-rand-core-dev"
        }
    ]
}

Ubuntu:24.04:LTS / rust-rand-core

Package

Name
rust-rand-core
Purl
pkg:deb/ubuntu/rust-rand-core@0.6.4-1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.6.3-2
0.6.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.6.4-1",
            "binary_name": "librust-rand-core+getrandom-dev"
        },
        {
            "binary_version": "0.6.4-1",
            "binary_name": "librust-rand-core+serde-dev"
        },
        {
            "binary_version": "0.6.4-1",
            "binary_name": "librust-rand-core+std-dev"
        },
        {
            "binary_version": "0.6.4-1",
            "binary_name": "librust-rand-core-dev"
        }
    ]
}

Ubuntu:25.10 / rust-rand-core

Package

Name
rust-rand-core
Purl
pkg:deb/ubuntu/rust-rand-core@0.6.4-2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.6.4-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core+getrandom-dev"
        },
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core+serde-dev"
        },
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core+std-dev"
        },
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core-dev"
        }
    ]
}

Ubuntu:25.04 / rust-rand-core

Package

Name
rust-rand-core
Purl
pkg:deb/ubuntu/rust-rand-core@0.6.4-2?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.6.4-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core+getrandom-dev"
        },
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core+serde-dev"
        },
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core+std-dev"
        },
        {
            "binary_version": "0.6.4-2",
            "binary_name": "librust-rand-core-dev"
        }
    ]
}