Bug 1686582
| Summary: | Incorrect handling of fragmented KeyUpdate messages | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Hubert Kario <hkario> |
| Component: | gnutls | Assignee: | Daiki Ueno <dueno> |
| Status: | CLOSED ERRATA | QA Contact: | Ondrej Moriš <omoris> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 8.0 | CC: | dueno, omoris, tmraz |
| Target Milestone: | rc | Keywords: | Triaged |
| Target Release: | 8.0 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | gnutls-3.6.8-1.el8 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-11-05 22:26:20 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2019:3600 |
Description of problem: KeyUpdate messages interleaved with ApplicationData are not rejected by gnutls. This is a RFC 8446 section 5.1 violation: - Handshake messages MUST NOT be interleaved with other record types. That is, if a handshake message is split over two or more records, there MUST NOT be any other records between them. Version-Release number of selected component (if applicable): gnutls-3.6.5-2.el8.x86_64 How reproducible: always Steps to Reproduce: 1. run tlsfuzzer test-tls13-keyupdate.py test script against gnutls server Actual results: among failing tests there are '1/4 fragmented keyupdate msg, appdata between' '2/3 fragmented keyupdate msg, appdata between' '3/2 fragmented keyupdate msg, appdata between' '4/1 fragmented keyupdate msg, appdata between' Expected results: the above tests should not be listed as failing Additional info: there are also issues in handling split GET messages and multiple KeyUpdates in succession, but they are not directly related to this issue