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prionPRIOn knowledge basePRION:CVE-2021-3761
HistorySep 09, 2021 - 2:15 p.m.

Input validation

2021-09-0914:15:00
PRIOn knowledge base
www.prio-n.com
11

7.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.7%

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.

CPENameOperatorVersion
octorpkilt1.3.0
debian_linuxeq11.0

7.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.7%