CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
45.4%
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.
github.com/cloudflare/cfrpki/commit/a8db4e009ef217484598ba1fd1c595b54e0f6422
github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9
launchpad.net/bugs/cve/CVE-2021-3761
nvd.nist.gov/vuln/detail/CVE-2021-3761
security-tracker.debian.org/tracker/CVE-2021-3761
www.cve.org/CVERecord?id=CVE-2021-3761
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
45.4%