[Bug 1474541] Re: sbsigntool broken by update to openssl 1.0.2c

[Launchpad Bug Tracker]

This bug was fixed in the package sbsigntool - 0.6-0ubuntu4~12.04.2

---------------
sbsigntool (0.6-0ubuntu4~12.04.2) precise; urgency=medium

  * debian/patches/0001-Support-openssl-1.0.2b-and-above.patch: handle the
    case where we can't get the issuer certificate, which typically happens
    after 1.0.2b; but it appears that 1.0.1f includes that check too, which
    fails in sbsigntool. (LP: #1474541)
  * debian/patches/ignore-certificate-expiries.patch: ignore certificate
    expiries when verifying signatures. (LP: #1234649)

 -- Mathieu Trudel-Lapierre <cyphermox at ubuntu.com>  Tue, 24 May 2016
14:41:24 -0400

** Changed in: sbsigntool (Ubuntu Precise)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1474541

Title:
  sbsigntool broken by update to openssl 1.0.2c

Status in sbsigntool package in Ubuntu:
  Fix Released
Status in sbsigntool source package in Precise:
  Fix Released
Status in sbsigntool source package in Trusty:
  Fix Released
Status in sbsigntool source package in Wily:
  Fix Released

Bug description:
  [Impact]
  Validating signature using sbsigntool for EFI binaries on Precise and Trusty.

  [Test case]
  1) pull-lp-source shim-signed
  2) sbverify --cert MicCorUEFCA2011_2011-06-27.crt shim.efi.signed

  [Regression potential]
  Complex signing scenarios may pass validation when they should not due to the unavailability of the issuer cert; but I can't think of a specific case where this might happen.

  ---

  An upload of shim-signed with no source changes is now failing to
  build in wily, because sbverify fails:

    sbverify --cert MicCorUEFCA2011_2011-06-27.crt shim.efi.signed
    warning: data remaining[1170360 vs 1289424]: gaps between PE/COFF sections?
    PKCS7 verification failed
    139919811188368:error:21075075:PKCS7 routines:PKCS7_verify:certificate verify error:pk7_smime.c:328:Verify error:unable to get issuer certificate
    Signature verification failed

  (https://launchpad.net/ubuntu/+source/shim-signed/1.10/+build/7652431)

  The package builds successfully on vivid but fails on wily.
  sbsigntool has not changed since vivid.  Upgrading to the wily version
  of libssl1.0.0 in a vivid chroot reproduces the failure.

  I'm not sure if this is a regression in libssl1.0.0 or a bug in
  sbsigntool.

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