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Security Advisories: GSA_kwCzR0hTQS1jOHhwLThtZjMtNjJoOc0VmA
OctoRPKI lacks contextual out-of-bounds check when validating RPKI ROA maxLength values
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
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JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jOHhwLThtZjMtNjJoOc0VmA
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: about 1 year ago
CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Identifiers: GHSA-c8xp-8mf3-62h9, CVE-2021-3761
References:
- https://github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9
- https://github.com/cloudflare/cfrpki/commit/a8db4e009ef217484598ba1fd1c595b54e0f6422
- https://github.com/cloudflare/cfrpki/releases/tag/v1.3.0
- https://nvd.nist.gov/vuln/detail/CVE-2021-3761
- https://www.debian.org/security/2022/dsa-5041
- https://github.com/cloudflare/cfrpki/pull/90
- https://pkg.go.dev/vuln/GO-2022-0246
- https://github.com/advisories/GHSA-c8xp-8mf3-62h9
Blast Radius: 0.0
Affected Packages
go:github.com/cloudflare/cfrpki
Dependent packages: 1Dependent repositories: 1
Downloads:
Affected Version Ranges: < 1.3.0
Fixed in: 1.3.0
All affected versions: 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.2.0, 1.2.1, 1.2.2
All unaffected versions: 1.3.0, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5, 1.5.6, 1.5.7, 1.5.8, 1.5.9, 1.5.10