UBUNTU-CVE-2018-1000520

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Source
https://ubuntu.com/security/CVE-2018-1000520
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-1000520
Upstream
Published
2018-06-26T16:29:00Z
Modified
2026-01-20T16:50:52.488532Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

ARM mbedTLS version 2.7.0 and earlier contains a Ciphersuite Allows Incorrectly Signed Certificates vulnerability in mbedtlssslgetverifyresult() that can result in ECDSA-signed certificates are accepted, when only RSA-signed ones should be.. This attack appear to be exploitable via Peers negotiate a TLS-ECDH-RSA-* ciphersuite. Any of the peers can then provide an ECDSA-signed certificate, when only an RSA-signed one should be accepted..

References

Affected packages

Ubuntu:16.04:LTS
mbedtls

Package

Name
mbedtls
Purl
pkg:deb/ubuntu/mbedtls@2.2.1-2ubuntu0.3?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*
2.1.2-1
2.2.0-1
2.2.1-1
2.2.1-2
2.2.1-2ubuntu0.1
2.2.1-2ubuntu0.2
2.2.1-2ubuntu0.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmbedcrypto0",
            "binary_version": "2.2.1-2ubuntu0.3"
        },
        {
            "binary_name": "libmbedtls-dev",
            "binary_version": "2.2.1-2ubuntu0.3"
        },
        {
            "binary_name": "libmbedtls10",
            "binary_version": "2.2.1-2ubuntu0.3"
        },
        {
            "binary_name": "libmbedx509-0",
            "binary_version": "2.2.1-2ubuntu0.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json"
Ubuntu:18.04:LTS
mbedtls

Package

Name
mbedtls
Purl
pkg:deb/ubuntu/mbedtls@2.8.0-1?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.5.1-1ubuntu1
2.6.0-1
2.7.0-2
2.8.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmbedcrypto1",
            "binary_version": "2.8.0-1"
        },
        {
            "binary_name": "libmbedtls-dev",
            "binary_version": "2.8.0-1"
        },
        {
            "binary_name": "libmbedtls10",
            "binary_version": "2.8.0-1"
        },
        {
            "binary_name": "libmbedx509-0",
            "binary_version": "2.8.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json"
Ubuntu:20.04:LTS
mbedtls

Package

Name
mbedtls
Purl
pkg:deb/ubuntu/mbedtls@2.16.4-1ubuntu2?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.16.2-1
2.16.3-1
2.16.4-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmbedcrypto3",
            "binary_version": "2.16.4-1ubuntu2"
        },
        {
            "binary_name": "libmbedtls-dev",
            "binary_version": "2.16.4-1ubuntu2"
        },
        {
            "binary_name": "libmbedtls12",
            "binary_version": "2.16.4-1ubuntu2"
        },
        {
            "binary_name": "libmbedx509-0",
            "binary_version": "2.16.4-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json"
Ubuntu:22.04:LTS
mbedtls

Package

Name
mbedtls
Purl
pkg:deb/ubuntu/mbedtls@2.28.0-1build1?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.16.9-0.1ubuntu1
2.16.11-0.1ubuntu1
2.16.11-0.3
2.28.0-1
2.28.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmbedcrypto7",
            "binary_version": "2.28.0-1build1"
        },
        {
            "binary_name": "libmbedtls-dev",
            "binary_version": "2.28.0-1build1"
        },
        {
            "binary_name": "libmbedtls14",
            "binary_version": "2.28.0-1build1"
        },
        {
            "binary_name": "libmbedx509-1",
            "binary_version": "2.28.0-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json"
Ubuntu:24.04:LTS
mbedtls

Package

Name
mbedtls
Purl
pkg:deb/ubuntu/mbedtls@2.28.8-1?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.28.3-1
2.28.6-1ubuntu1
2.28.7-1ubuntu1
2.28.7-1.1ubuntu1
2.28.8-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmbedcrypto7t64",
            "binary_version": "2.28.8-1"
        },
        {
            "binary_name": "libmbedtls-dev",
            "binary_version": "2.28.8-1"
        },
        {
            "binary_name": "libmbedtls14t64",
            "binary_version": "2.28.8-1"
        },
        {
            "binary_name": "libmbedx509-1t64",
            "binary_version": "2.28.8-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json"
Ubuntu:25.10
mbedtls

Package

Name
mbedtls
Purl
pkg:deb/ubuntu/mbedtls@3.6.2-3ubuntu1?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.6.2-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libmbedcrypto16",
            "binary_version": "3.6.2-3ubuntu1"
        },
        {
            "binary_name": "libmbedtls-dev",
            "binary_version": "3.6.2-3ubuntu1"
        },
        {
            "binary_name": "libmbedtls21",
            "binary_version": "3.6.2-3ubuntu1"
        },
        {
            "binary_name": "libmbedx509-7",
            "binary_version": "3.6.2-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1000520.json"