GHSA-c8xp-8mf3-62h9

OctoRPKI lacks contextual out-of-bounds check when validating RPKI ROA maxLength values

Source: GitHub Advisory Database (reviewed) High CVE-2021-3761

Packages

Ecosystem	Package	Affected	Fixed in
Go	github.com/cloudflare/cfrpki	< 1.3.0	1.3.0

Details

As written in the advisory (Markdown source, shown as plain text).

Any CA issuer in the RPKI can trick OctoRPKI prior to https://github.com/cloudflare/cfrpki/commit/a8db4e009ef217484598ba1fd1c595b54e0f6422 into emitting an invalid VRP "MaxLength" value, causing RTR sessions to terminate. ### Impact 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. ### Patches https://github.com/cloudflare/cfrpki/commit/a8db4e009ef217484598ba1fd1c595b54e0f6422 https://github.com/cloudflare/cfrpki/releases/tag/v1.3.0 ### For more information If you have any questions or comments about this advisory: * Email us at [[email protected]]([email protected])

References

External links from the advisory. They lead to third-party sites.