apt, branch 1.7.0_alpha3

Release 1.7.0~alpha3

2018-08-20T16:29:16Z

clear alternative URIs for mirror:// between steps (CVE-2018-0501)

2018-08-20T16:29:16Z

APT in 1.6 saw me rewriting the mirror:// transport method, which works comparable to the decommissioned httpredir.d.o "just" that apt requests a mirror list and performs all the redirections internally with all the bells like parallel download and automatic fallback (more details in the apt-transport-mirror manpage included in the 1.6 release). The automatic fallback is the problem here: The intend is that if a file fails to be downloaded (e.g. because the mirror is offline, broken, out-of-sync, …) instead of erroring out the next mirror in the list is contacted for a retry of the download. Internally the acquire process of an InRelease file (works with the Release/Release.gpg pair, too) happens in steps: 1) download file and 2) verify file, both handled as URL requests passed around. Due to an oversight the fallbacks for the first step are still active for the second step, so that the successful download from another mirror stands in for the failed verification… *facepalm* Note that the attacker can not judge by the request arriving for the InRelease file if the user is using the mirror method or not. If entire traffic is observed Eve might be able to observe the request for a mirror list, but that might or might not be telling if following requests for InRelease files will be based on that list or for another sources.list entry not using mirror (Users have also the option to have the mirror list locally (via e.g. mirror+file://) instead of on a remote host). If the user isn't using mirror:// for this InRelease file apt will fail very visibly as intended. (The mirror list needs to include at least two mirrors and to work reliably the attacker needs to be able to MITM all mirrors in the list. For remotely accessed mirror lists this is no limitation as the attacker is in full control of the file in that case) Fixed by clearing the alternatives after a step completes (and moving a pimpl class further to the top to make that valid compilable code). mirror:// is at the moment the only method using this code infrastructure (for all others this set is already empty) and the only method-independent user so far is the download of deb files, but those are downloaded and verified in a single step; so there shouldn't be much opportunity for regression here even through a central code area is changed. Upgrade instructions: Given all apt-based frontends are affected, even additional restrictions like signed-by are bypassed and the attack in progress is hardly visible in the progress reporting of an update operation (the InRelease file is marked "Ign", but no fallback to "Release/Release.gpg" is happening) and leaves no trace (expect files downloaded from the attackers repository of course) the best course of action might be to change the sources.list to not use the mirror family of transports ({tor+,…}mirror{,+{http{,s},file,…}}) until a fixed version of the src:apt packages are installed. Regression-Of: 355e1aceac1dd05c4c7daf3420b09bd860fd169d, 57fa854e4cdb060e87ca265abd5a83364f9fa681 LP: #1787752

Update symbols

2018-08-20T16:29:16Z

Report (soon) worthless keys if gpg uses fpr for GOODSIG

2018-08-19T15:30:31Z

gpgs DETAILS documentation file declares that GOODSIG could report keyid or fingerprint since gpg2, but for the time being it is still keyid only. Who knows if that will ever change as that feels like an interface break with dangerous security implications, but lets be better safe than sorry especially as the code dealing with signed-by keyids is prepared for this already. This code is rewritten still to have them all use the same code for this type of problem.

test: Supports records larger than 32kb in 'apt show'

2018-08-19T15:25:43Z

The 1.7 series rework of show started in bf53f39c9a0221b670ffff74053ed36fc502d5a0 resolved the issue already, but its always a good idea to at least bring the tests along so that we hopeful do not regress in the future with another rewrite. Tests: #905527 Gbp-Dch: Ignore

Simplified Chinese program translation update

2018-08-19T15:25:43Z

Reviewed-by: Mo Zhou Closes: #903695

aptwebserver: Prefetch compressors to avoid thread crashes

2018-08-19T15:25:26Z

If multiple threads act on requests (like if connection comes from a webbrowser) a thread might request the supported compressors while another thread is still working on creating the list to be stored in the static cache variable. As the price to pay for atomic and co seems to high for the fringe usecase of manual usage of aptwebserver the patch just makes a call to generate the list while still single threaded. Gbp-Dch: Ignore

CMake: Use ${PROJECT_NAME} instead of hardcoding apt

2018-08-14T17:44:28Z

Completely pointless as it makes no difference for apt, but copying the file to other projects becomes a lot easier. Gbp-Dch: Ignore

Set DPKG_FRONTEND_LOCKED as needed when doing selection changes

2018-08-08T13:20:44Z

We forgot to set the variable for the selection changes. Let's set it for that and some other dpkg calls. Regression-Of: c2c8b4787b0882234ba2772ec7513afbf97b563a

Merge branch 'bugfix/big-lock' into 'master'

2018-08-07T13:51:13Z

Add support for dpkg frontend lock See merge request apt-team/apt!11