UBUNTU-CVE-2020-11810

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Source
https://ubuntu.com/security/notices/UBUNTU-CVE-2020-11810
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11810.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-11810
Related
Published
2020-04-27T15:15:00Z
Modified
2020-04-27T15:15:00Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (PDATAV2) packet using a victim's peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim's connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use.

References

Affected packages

Ubuntu:18.04:LTS / openvpn

Package

Name
openvpn
Purl
pkg:deb/ubuntu/openvpn@2.4.4-2ubuntu1.5?arch=src?distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.4-2ubuntu1.5

Affected versions

2.*

2.4.3-4ubuntu1
2.4.4-1ubuntu1
2.4.4-2ubuntu1
2.4.4-2ubuntu1.1
2.4.4-2ubuntu1.2
2.4.4-2ubuntu1.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "openvpn-dbgsym": "2.4.4-2ubuntu1.5",
            "openvpn": "2.4.4-2ubuntu1.5"
        }
    ]
}

Ubuntu:20.04:LTS / openvpn

Package

Name
openvpn
Purl
pkg:deb/ubuntu/openvpn@2.4.7-1ubuntu2.20.04.2?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.7-1ubuntu2.20.04.2

Affected versions

2.*

2.4.7-1ubuntu2

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "openvpn-dbgsym": "2.4.7-1ubuntu2.20.04.2",
            "openvpn": "2.4.7-1ubuntu2.20.04.2"
        }
    ]
}