I was pleased to see that there was a new trusty-updates package for
curl that fixes a number of out-of-bounds reads!

And I was immediately disappointed that it didn't fix _this_ set of out-
of-bounds reads.

Alas.

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https://bugs.launchpad.net/bugs/1707214

Title:
  libcurl3 crashes when reusing handle with proxy NTLM authentication

Status in curl package in Ubuntu:
  New

Bug description:
  The package libcurl3-7.35.0 on Ubuntu Trusty crashes when reusing a
  curl handle and turning on proxy NTLM authentication. The libgit2
  project is repeatedly hitting this issue on the new Travis CI
  container infrastructure, which they have recently updated to make use
  of Ubuntu Trusty.

  This issue stems from the backported fix to CVE-2016-0755 (NTLM: Fix
  ConnectionExists to compare Proxy credentials), which introduces a
  null-pointer exception when one of the proxy credentials is `NULL`.
  The issue has already been fixed upstream in commit
  fa5fa65a309f352284e58f52183d586886eb17ea, which should be backported
  to fix the segfault. See the attached patch from Isaac Boukris.

  Please consider including this patch to fix the fix for CVE-2016-0755.

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