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2019-02-05Introduce experimental 'never' pinning for sourcesJulian Andres Klode
This allows disabling a repository by pinning it to 'never', which is internally translated to a value of -32768 (or whatever the minimum of short is). This overrides any other pin for that repository. It can be used to make sure certain sources are never used; for example, in unattended-upgrades. To prevent semantic changes to existing files, we substitute min + 1 for every pin-priority: <min>. This is a temporary solution, as we are waiting for an ABI break. To add pins with that value, the special Pin-Priority "never" may be used for now. It's unclear if that will persist, or if the interface will change eventually. (cherry picked from commit 8bb2a91a070170d7d8e71206d1c66a26809bdbc3) LP: #1814727 (cherry picked from commit f52e7a2040f461fb37f88751f5a42a5d5c130441)
2019-01-25SECURITY UPDATE: content injection in http method (CVE-2019-3462)Julian Andres Klode
This fixes a security issue that can be exploited to inject arbritrary debs or other files into a signed repository as followed: (1) Server sends a redirect to somewhere%0a<headers for the apt method> (where %0a is \n encoded) (2) apt method decodes the redirect (because the method encodes the URLs before sending them out), writting something like somewhere\n <headers> into its output (3) apt then uses the headers injected for validation purposes. Regression-Of: c34ea12ad509cb34c954ed574a301c3cbede55ec LP: #1812353
2019-01-14Add support for /etc/apt/auth.conf.d/*.conf (netrcparts)Julian Andres Klode
This allows us to install matching auth files for sources.list.d files, for example; very useful. This converts aptmethod's authfd from one FileFd to a vector of pointers to FileFd, as FileFd cannot be copied, and move operators are hard. (cherry picked from commit bbfcc05c1978decd28df9681fd73e2a7d9a8c2a5) LP: #1811120 (cherry picked from commit 5629f35ecb7956b180364ebaf57e79f35885344e)
2018-10-09Set DPKG_FRONTEND_LOCKED when running {pre,post}-invoke scriptsJulian Andres Klode
Some post-invoke scripts install packages, which fails because the environment variable is not set. This sets the variable for all three kinds of scripts {pre,post-}invoke and pre-install-pkgs, but we will only allow post-invoke at a later time. Gbp-Dch: full (cherry picked from commit 6675601c81de85b40dc89772c1d6d17f1811c5ba) LP: #1796808
2018-08-20Support records larger than 32kb in 'apt show'David Kalnischkies
The default buffer size for pkgTagFile is 32kb which should be big enough for everything… expect for enormous lists of provides, resulting in: $ apt show librust-winapi-dev E: Unable to parse package file /var/lib/apt/lists/ftp.br.debian.org_debian_dists_unstable_main_binary-amd64_Packages (2) E: Internal Error, Unable to parse a package record The "apt-cache show" codepath uses instead a max size for all files, which seems a bit excessive, but works – using the max size for the file in question seems most appropriate. The patch is written for the 1.6.y series as a rewrite of the related code in the 1.7.y series (commit bf53f39c9a0221b670ffff74053ed36fc502d5a0) removed this problem before it was reported. Closes: #905527 LP: #1787120
2018-08-20clear alternative URIs for mirror:// between steps (CVE-2018-0501)David Kalnischkies
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
2018-07-09Handle JSON hooks that just close the file/exit and fix some other errorsJulian Andres Klode
JSON hooks might disappear and the common idiom to work around hooks disappearing is to check for the hook in the shell snippet that is in the apt.conf file and if it does not exist, do nothing. This caused APT to fail however, expecting it to acknowledge the handshake. Ignoring ECONNRESET on handshakes solves the problem. The error case, and the other error cases also did not stop execution of the hook, causing more errors to pile up. Fix this by directly going to the closing part of the code. LP: #1776218 (cherry picked from commit 1d53cffad22c92645090e0e6ddde31fe4f7c3b05)
2018-06-25Fix hidden test failure if not called via sudoDavid Kalnischkies
id: '': no such user ./test-bug-611729-mark-as-manual: 59: [: Illegal number: Regression-of: 68842e1741a5005b1e3f0a07deffd737c65e3294 Gbp-Dch: Ignore (cherry picked from commit ea901a491bcfe406267c7c38c227c5caabf017a0)
2018-06-25tests: Do not expect requested-by if sudo was invoked by rootJulian Andres Klode
If sudo was invoked by root, SUDO_UID will be 0, and apt will not print a Requested-By line. (cherry picked from commit 68842e1741a5005b1e3f0a07deffd737c65e3294)
2018-04-15Merge branch 'pu/heavy-hooks' into 'master'Julian Andres Klode
json-based hooks for apt cli tools See merge request apt-team/apt!10
2018-04-15Introduce experimental new hooks for command-line toolsJulian Andres Klode
This allows third-party package managers like snap or flatpak to hook in and suggest alternatives if packages could not be found, for example. This is still highly experimental and the protocol might change in future versions.
2018-04-15Merge branch 'pu/zstd' into 'master'Julian Andres Klode
pu/zstd See merge request apt-team/apt!8
2018-04-06test: export GCOV_ERROR_FILE=/dev/null to make it fail less/no testsJulian Andres Klode
2018-03-15Use https for Ubuntu changelogsJulian Andres Klode
We just enabled https on changelogs.ubuntu.com, let's use it.
2018-03-12apt-pkg: Add support for zstdJulian Andres Klode
zstd is a compression algorithm developed by facebook. At level 19, it is about 6% worse in size than xz -6, but decompression is multiple times faster, saving about 40% install time, especially with eatmydata on cloud instances.
2018-02-19Merge branch 'pu/not-valid-before' into 'master'Julian Andres Klode
Check that Date of Release file is not in the future See merge request apt-team/apt!3
2018-02-19Check that Date of Release file is not in the futureJulian Andres Klode
By restricting the Date field to be in the past, an attacker cannot just create a repository from the future that would be accepted as a valid update for a repository. This check can be disabled by Acquire::Check-Date set to false. This will also disable Check-Valid-Until and any future date related checking, if any - the option means: "my computers date cannot be trusted." Modify the tests to allow repositories to be up to 10 hours in the future, so we can keep using hours there to simulate time changes.
2018-02-19ensure correct file permissions for auxfilesDavid Kalnischkies
The interesting takeaway here is perhaps that 'chmod +w' is effected by the umask – obvious in hindsight of course. The usual setup helps with hiding that applying that recursively on all directories (and files) isn't correct. Ensuring files will not be stored with the wrong permissions even if in strange umask contexts is trivial in comparison. Fixing the test also highlighted that it wasn't bulletproof as apt will automatically fix the permissions of the directories it works with, so for this test we actually need to introduce a shortcut in the code. Reported-By: Ubuntu autopkgtest CI
2018-02-19tests: set debhelper compat 10 and R³ by defaultDavid Kalnischkies
The testpackages hardly need debhelper at all, so any version would do, and they build without root rights by definition, but declaring it explicitly can't hurt and in the case of debhelper it would be sad if our testcases break one day because the old compat level is removed. Gbp-Dch: Ignore
2018-02-19add apt-helper drop-privs command…David Kalnischkies
2018-02-19Work around test-method-mirror failure by setting umask at startJulian Andres Klode
This fixes a test failure on autopkgtest.
2018-01-19allow the apt/lists/auxfiles/ directory to be missingDavid Kalnischkies
apt 1.6~alpha6 introduced aux requests to revamp the implementation of a-t-mirror. This already included the potential of running as non-root, but the detection wasn't complete resulting in errors or could produce spurious warnings along the way if the directory didn't exist yet. References: ef9677831f62a1554a888ebc7b162517d7881116 Closes: 887624
2018-01-17Introduce inrelease-path option for sources.listJulian Andres Klode
Allow specifying an alternative path to the InRelease file, so you can have multiple versions of a repository, for example. Enabling this option disables fallback to Release and Release.gpg, so setting it to InRelease can be used to ensure that only that will be tried. We add two test cases: One for checking that it works, and another for checking that the fallback does not happen. Closes: #886745
2018-01-03add a testcase for the mirror methodDavid Kalnischkies
Gbp-Dch: Ignore
2018-01-03allow a method to request auxiliary filesDavid Kalnischkies
If a method needs a file to operate like e.g. mirror needs to get a list of mirrors before it can redirect the the actual requests to them. That could easily be solved by moving the logic into libapt directly, but by allowing a method to request other methods to do something we can keep this logic contained in the method and allow e.g. also methods which perform binary patching or similar things. Previously they would need to implement their own acquire system inside the existing one which in all likelyhood will not support the same features and methods nor operate with similar security compared to what we have already running 'above' the requesting method. That said, to avoid methods producing conflicts with "proper" files we are downloading a new directory is introduced to keep the auxiliary files in. [The message magic number 351 is a tribute to the german Grundgesetz article 35 paragraph 1 which defines that all authorities of the state(s) help each other on request.]
2018-01-03refactor message generation for methodsDavid Kalnischkies
The format isn't too hard to get right, but it gets funny with multiline fields (which we don't really have yet) and its just easier to deal with it once and for all which can be reused for more messages later.
2017-12-24do not remap current files if nullptrs in cache generationDavid Kalnischkies
If the cache needs to grow to make room to insert volatile files like deb files into the cache we were remapping null-pointers making them non-null-pointers in the process causing trouble later on. Only the current Releasefile pointer can currently legally be a nullpointer as volatile files have no release file they belong to, but for safety the pointer to the current Packages file is equally guarded. The option APT::Cache-Start can be used to workaround this problem. Reported-By: Mattia Rizzolo on IRC
2017-12-14relax test to accept various connection failuresDavid Kalnischkies
For the failure propagation testing we try to connect to a port which isn't open – you would think that this has a rather limited set of failure modes but it turns out that there are various ways this can fail, so instead of trying to guess all error message we just accept any. Reported-By: travis-ci Gbp-Dch: Ignore
2017-12-13implement fallback to alternative URIs for all itemsDavid Kalnischkies
For deb files we always supported falling back from one server to the other if one failed to download the deb, but that was hardwired in the handling of this specific item. Moving this alongside the retry infrastructure we can implement it for all items and allow methods to use this as well by providing additional URIs in a redirect.
2017-12-13implement Acquire::Retries support for all itemsDavid Kalnischkies
Moving the Retry-implementation from individual items to the worker implementation not only gives every file retry capability instead of just a selected few but also avoids needing to implement it in each item (incorrectly).
2017-12-13don't auto-switch candidate if installed is good enoughDavid Kalnischkies
If we perform candidate switching in requests like "apt install foo/bar" we should first check if the dependencies of foo from release bar are already satisfied by what is already installed before checking if the candidate (or switched candidate) would.
2017-12-13if insecure repo is allowed continue on all http errorsDavid Kalnischkies
If a InRelease file fails to download with a non-404 error we assumed there is some general problem with repository like a webportal or your are blocked from access (wrong auth, Tor, …). Turns out some server like S3 return 403 if a file doesn't exist. Allowing this in general seems like a step backwards as 403 is a reasonable response if auth failed, so failing here seems better than letting those users run into problems. What we can do is show our insecure warnings through and allow the failures for insecure repos: If the repo is signed it is easy to add an InRelease file and if not you are setup for trouble anyhow. References: cbbf185c3c55effe47f218a07e7b1f324973a8a6
2017-11-22tests: Improve handling profiling messages on CIJulian Andres Klode
We did not strip away profiling messages when we were diffing from stdin (-). Just always write temporary files and strip from them. We also had a problem when stripping ...profiling: from a line and the next line starts with profiling. Split the sed into two calls so we first remove complete profiling: lines before fixing the ...profiling: cases.
2017-11-19support COLUMNS environment variable in apt toolsDavid Kalnischkies
apt usually gets the width of the window from the terminal or failing that has a default value, but especially for testing it can be handy to control the size as you can't be sure that variable sized content will always be linebreaked as expected in the testcases.
2017-11-19allow multivalue fields in deb822 sources to be foldedDavid Kalnischkies
The documentation said "spaces", but there is no real reason to be so strict and only allow spaces to separate values as that only leads to very long lines if e.g. multiple URIs are specified which are again hard to deal with from a user PoV which the deb822 format is supposed to avoid. It also deals with multiple consecutive spaces and strange things like tabs users will surely end up using in the real world. The old behviour on encountering folded lines is the generation of URIs which end up containing all these whitespace characters which tends to mess really bad with output and further processing. Closes: 881875
2017-10-28Prevent overflow in Installed-Size (and Size) in apt showJulian Andres Klode
Installed-Size for linux-image-4.13.0-1-amd64-dbg and friends are larger than 4 GB, but read as a signed integer - that's fine so far, as the value is in KB, but it's multiplied with 1024 which overflows. So let's read it as unsigned long long instead. While we're at it, also use unsigned long long for Size, in case that is bigger than 2 GB.
2017-10-20Fix testsuite for and add new fields from dpkg 1.19Julian Andres Klode
tagfile-order.c: Add missing fields from dpkg 1.19 For binary packages, this is Build-Essential; for source packages, it is Description. test-bug-718329-...: Ignore control.tar.*, changes in dpkg 1.19 test-apt-extracttemplates: Fix for dpkg 1.19
2017-10-05ignore unsupported key formats in apt-keyDavid Kalnischkies
gpg2 generates keyboxes by default and users end up putting either those or armored files into the trusted.gpg.d directory which apt tools neither expect nor can really work with without fortifying backward compatibility (at least under the ".gpg" extension). A (short) discussion about how to deal with keyboxes happened in https://lists.debian.org/deity/2017/07/msg00083.html As the last message in that thread is this changeset lets go ahead with it and see how it turns out. The idea is here simply that we check the first octal of a gpg file to have one of three accepted values. Testing on my machines has always produced just one of these, but running into those values on invalid files is reasonabily unlikely to not worry too much. Closes: #876508
2017-09-26allow empty build-dependency fields in the parserDavid Kalnischkies
APT used to parse only wellformed files produced by repository creation tools which removed empty files as pointless before apt would see them. Now that apt can be told to parse e.g. debian/control files directly, it needs to be a little more accepting through: We had this with comments already, now let it deal with the far more trivial empty fields. Closes: #875363
2017-09-26proper error reporting for v3 onion servicesDavid Kalnischkies
APT connects just fine to any .onion address given, only if the connect fails somehow it will perform checks on the sanity of which in this case is checking the length as they are well defined and as the strings are arbitrary a user typing them easily mistypes which apt should can be slightly more helpful in figuring out by saying the onion hasn't the required length.
2017-09-24Drop curl method and apt-transport-https packageJulian Andres Klode
This automatically removes any old apt-transport-https, as apt now Breaks it unversioned.
2017-09-09ftparchive: Do not pass through disabled hashes in SourcesJulian Andres Klode
When writing a Sources files hashes that were already present in the .dsc were always copied through (or modified), even if disabled. Remove them instead when they are disabled, otherwise we end up with hashes for tarballs and stuff but not for dsc files (as the dsc obviously does not hash itself). Also adjust the tests: test-compressed-indexes relied on Files being present in showsrc, and test-apt-update-weak-hashes expected the tarball to be downloaded when an archive only has MD5 and we are requiring SHA256 because that used to work because the tarball was always included. Closes: #872963
2017-09-09add test for bug 870675 (hang on unsupported method)David Kalnischkies
Commit e250a8d8d8ef2f8f8c5e2041f7645c49fba7aa36 implemented the fix and should have included already this testcase for it. Gbp-Dch: Ignore
2017-09-09test: Workaround gpgv warningJulian Andres Klode
gpgv: WARNING: This key is not suitable for signing in --compliance=gnupg mode
2017-08-24Make test-bug-818628-unreadable-source work on !amd64Julian Andres Klode
It was broken because apt.conf.d was not readable, but that's where the architecture is defined...
2017-08-04ftparchive: sort discovered filenames before writing indexesDavid Kalnischkies
If 'apt-ftparchive packages /path/to/files/' (or sources) is used the files to include in the generated index (on stdout) were included in the order in which they were discovered, which isn't a very stable order which could lead to indexes changing without actually changing content causing needless changes in the repository changing hashsums, pdiffs, rsyncs, downloads, …. This does not effect apt-ftparchive calls which already have an order defined via a filelist (like generate) which will still print in the order given by the filelist. Note that a similar effect can be achieved by post-processing index files with apt-sortpkgs. Closes: 869557 Thanks: Chris Lamb for initial patch & Stefan Lippers-Hollmann for testing
2017-07-26suggest using auth.conf for sources with passwordsDavid Kalnischkies
The feature exists for a long while even if we get around to document it properly only now, so we should push for its adoption a bit to avoid the problems its supposed to solve like avoiding usage of non-world readable configuration files as they can cause strange behaviour for the unsuspecting user (like different solutions as root and non-root).
2017-07-26show a warning for Debian shutting down FTP servicesDavid Kalnischkies
We detect the effected sources by matching Release info – that has potential by-catch of repositories which have incorrect field values, but those are better fixed now anyhow. The bigger incorrectness is that this message will not only be printed for the Debian services itself but also for all mirrors not under Debian control but serving Debian like more local/private mirrors which will not (directly) shutdown. It is likely through that many of them will follow suite with less visible announcements or break downright if their upstream source disappears, so having false-positives here seems benefitial for the user in the end.
2017-07-26lookup login info for proxies in auth.confDavid Kalnischkies
On HTTP Connect we since recently look into the auth.conf file for login information, so we should really look for all proxies into the file as the argument is the same as for sources entries and it is easier to document (especially as the manpage already mentions it as supported).
2017-07-26reimplement and document auth.confDavid Kalnischkies
We have support for an netrc-like auth.conf file since 0.7.25 (closing 518473), but it was never documented in apt that it even exists and netrc seems to have fallen out of usage as a manpage for it no longer exists making the feature even more arcane. On top of that the code was a bit of a mess (as it is written in c-style) and as a result the matching of machine tokens to URIs also a bit strange by checking for less specific matches (= without path) first. We now do a single pass over the stanzas. In practice early adopters of the undocumented implementation will not really notice the differences and the 'new' behaviour is simpler to document and more usual for an apt user. Closes: #811181