for later reference, i'd discussed this with nick and asked him to check if the 'status_request' reply contained any kind of valid data in the specific cases where this patch will disable it; my concern is if there is valid data in it, it's possible there are applications out there that might currently expect and/or use it, even if it's against the RFC, which might result in a regression after this patch. However, if the reply is empty or just has garbage, it's unlikely that any application is using it for anything currently, so there would be less chance of causing a regression.
** Tags added: sts-sponsor-ddstreet -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssl in Ubuntu. https://bugs.launchpad.net/bugs/1940141 Title: OpenSSL servers can send a non-empty status_request in a CertificateRequest Status in openssl package in Ubuntu: Fix Released Status in openssl source package in Bionic: New Bug description: [Impact] openssl does not conform to RFC8446, Sec. 4.4.2.1., by sending a CertificateRequest message to the client with a non-empty status_request extension. This issue was fixed in openssl-1.1.1d and is included in Focal onward. Upstream issue is tracked at https://github.com/openssl/openssl/issues/9767 Upstream patch review at https://github.com/openssl/openssl/pull/9780 The issue leads to various client failures with TLS 1.3 as described in, e.g. https://github.com/golang/go/issues/35722 https://github.com/golang/go/issues/34040 [Test Plan] The issue can be reproduced by building with `enable-ssl-trace` and then running `s_server` like this: ``` openssl s_server -key key.pem -cert cert.pem -status_file test/recipes/ocsp-response.der -Verify 5 ``` And running `s_client` like this: ``` openssl s_client -status -trace -cert cert.pem -key key.pem ``` The output shows a `status_request` extension in the `CertificateRequest` as follows: Received Record Header: Version = TLS 1.2 (0x303) Content Type = ApplicationData (23) Length = 1591 Inner Content Type = Handshake (22) CertificateRequest, Length=1570 request_context (len=0): extensions, length = 1567 extension_type=status_request(5), length=1521 0000 - 01 00 05 ed 30 82 05 e9-0a 01 00 a0 82 05 e2 ....0.......... 000f - 30 82 05 de 06 09 2b 06-01 05 05 07 30 01 01 0.....+.....0.. 001e - 04 82 05 cf 30 82 05 cb-30 82 01 1a a1 81 86 ....0...0...... 002d - 30 81 83 31 0b 30 09 06-03 55 04 06 13 02 47 0..1.0...U....G ...more lines omitted... If the `status_request` extension is present in a `CertificateRequest` then it must be empty according to RFC8446, Sec. 4.4.2.1. [Where problems could occur] The patch disables the `status_request` extension inside a `CertificateRequest`. Applications expecting the incorrect, non-empty reply for the `status_request` extension will break with this patch. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1940141/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
