[Bug 2054090] [NEW] Implicit rejection of PKCS#1 v1.5 RSA

[David Fernandez Gonzalez]

Public bug reported:

OpenSSL 3.2.0 introduced a change on PKCS#1 v1.5 RSA to return random
output instead of an exception when detecting wrong padding
(https://github.com/openssl/openssl/pull/13817).

There are available backports already:

* 3.0 https://gitlab.com/redhat/centos-
stream/rpms/openssl/-/blob/c9s/0120-RSA-PKCS15-implicit-
rejection.patch?ref_type=heads

* 1.1.1 https://gitlab.com/redhat/centos-
stream/rpms/openssl/-/blob/c8s/openssl-1.1.1-pkcs1-implicit-
rejection.patch?ref_type=heads


This change is needed to fix CVE-2023-50782.

** Affects: openssl (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to openssl in Ubuntu.
https://bugs.launchpad.net/bugs/2054090

Title:
  Implicit rejection of PKCS#1 v1.5 RSA

Status in openssl package in Ubuntu:
  New

Bug description:
  OpenSSL 3.2.0 introduced a change on PKCS#1 v1.5 RSA to return random
  output instead of an exception when detecting wrong padding
  (https://github.com/openssl/openssl/pull/13817).

  There are available backports already:

  * 3.0 https://gitlab.com/redhat/centos-
  stream/rpms/openssl/-/blob/c9s/0120-RSA-PKCS15-implicit-
  rejection.patch?ref_type=heads

  * 1.1.1 https://gitlab.com/redhat/centos-
  stream/rpms/openssl/-/blob/c8s/openssl-1.1.1-pkcs1-implicit-
  rejection.patch?ref_type=heads

  
  This change is needed to fix CVE-2023-50782.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/2054090/+subscriptions