CVE-2021-3761

Description

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.

Risk Information

Base Score

7.5

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Score

Exploitation Probability

0.447

Associated Vulnerability

Vulnerability	OS Platform
cfrpki security update(DSA-5041-1) octorpki_1.4.2-1~deb11u1_i386.deb	Linux
cfrpki security update(DSA-5041-1) octorpki_1.4.2-1~deb11u1_amd64.deb	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234