[Bug 1915906] Re: Ensure SRP BN_mod_exp follows the constant time path

[Adrien Nader]

Hi. Openssl is a delicate component, used by many other packages. As a
consequence, it is only patched if there is a strong need. Looking at
the pull request you've linked to, this falls outside of the openssl
threat model since it is local only. I'm not sure Ubuntu has a stricter
threat model for openssl. I'm going to ask around but even if Ubuntu
does, it is probably an exploit that is difficult to pull off on a
component that is risky to touch. Overall I don't think it is likely
that focal receives a corresponding update.

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Title:
  Ensure SRP BN_mod_exp follows the constant time path

Status in openssl package in Ubuntu:
  Confirmed

Bug description:
  Hello,

  I'd like to point out that there are two fixes missing from the
  upstream, is there any chance to get them incorporated?

  https://github.com/openssl/openssl/pull/13888
  https://github.com/openssl/openssl/pull/13889

  There was no CVE assigned, it was fixed between 1.1.1i and 1.1.1j.

  Best regards

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