[Bug 1812353] Re: content injection in http method (CVE-2019-3462)

[Christoph Anton Mitterer]

Hmm that's pretty bad then (which is not to be read as blaming you or
anyone else here).

Are there going to be any… "consequences"?

I mean trying to find out whether systems have been compromised is probably impossible... an attacker could have used this long ago to basically do everything, from silently taking over end user systems to secretly injecting code in development repos.
Sure one can argue that this might have been noticed - but it also might have been not.


But is there a chance to e.g. get full audits of apt done by security experts?

I'd assume that aptitude was also fully affected by this, right?

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https://bugs.launchpad.net/bugs/1812353

Title:
  content injection in http method (CVE-2019-3462)

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Precise:
  Fix Released
Status in apt source package in Trusty:
  Fix Released
Status in apt source package in Xenial:
  Fix Released
Status in apt source package in Bionic:
  Fix Released
Status in apt source package in Cosmic:
  Fix Released
Status in apt source package in Disco:
  Fix Released

Bug description:
  apt, starting with version 0.8.15, decodes target URLs of redirects,
  but does not check them for newlines, allowing MiTM attackers (or
  repository mirrors) to inject arbitrary headers into the result
  returned to the main process.

  If the URL embeds hashes of the supposed file, it can thus be used to
  disable any validation of the downloaded file, as the fake hashes will
  be prepended in front of the right hashes.

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