UBUNTU-CVE-2021-3761

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Source
https://ubuntu.com/security/CVE-2021-3761
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3761.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3761
Related
Published
2021-09-09T14:15:00Z
Modified
2021-09-09T14:15:00Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Any CA issuer in the RPKI can trick OctoRPKI prior to 1.3.0 into emitting an invalid VRP "MaxLength" value, causing RTR sessions to terminate. An attacker can use this to disable RPKI Origin Validation in a victim network (for example AS 13335 - Cloudflare) prior to launching a BGP hijack which during normal operations would be rejected as "RPKI invalid". Additionally, in certain deployments RTR session flapping in and of itself also could cause BGP routing churn, causing availability issues.

References

Affected packages

Ubuntu:22.04:LTS / cfrpki

Package

Name
cfrpki
Purl
pkg:deb/ubuntu/cfrpki?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.4.2-1

Affected versions

1.*

1.2.2-1
1.3.0-1
1.4.0-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1.4.2-1",
            "binary_name": "octorpki"
        },
        {
            "binary_version": "1.4.2-1",
            "binary_name": "octorpki-dbgsym"
        }
    ]
}