test/integration/test-apt-update-nofallback

   1 #!/bin/sh
   2 #
   3 # ensure we never fallback from a signed to a unsigned repo
   4 #
   5 # hash checks are done in
   6 #
   7 set -e
   8
   9 simulate_mitm_and_inject_evil_package()
  10 {
  11     redatereleasefiles '+1 hour'
  12     rm -f "$APTARCHIVE/dists/unstable/InRelease"
  13     rm -f "$APTARCHIVE/dists/unstable/Release.gpg"
  14     inject_evil_package
  15 }
  16
  17 inject_evil_package()
  18 {
  19     cat > "$APTARCHIVE/dists/unstable/main/binary-i386/Packages" <<EOF
  20 Package: evil
  21 Installed-Size: 29
  22 Maintainer: Joe Sixpack <joe@example.org>
  23 Architecture: all
  24 Version: 1.0
  25 Filename: pool/evil_1.0_all.deb
  26 Size: 1270
  27 Description: an autogenerated evil package
  28 EOF
  29     # avoid ims hit
  30     touch -d '+1hour' aptarchive/dists/unstable/main/binary-i386/Packages
  31     compressfile aptarchive/dists/unstable/main/binary-i386/Packages
  32 }
  33
  34 assert_update_is_refused_and_last_good_state_used()
  35 {
  36     testfailuremsg "E: The repository 'file:${APTARCHIVE} unstable Release' is no longer signed.
  37 N: Updating such a repository securily is impossible and therefore disabled by default.
  38 N: See apt-secure(8) manpage for repository creation and user configuration details." aptget update -q=0
  39
  40     assert_repo_is_intact
  41 }
  42
  43 assert_repo_is_intact()
  44 {
  45     testsuccessequal "foo/unstable 2.0 all" apt list -q
  46     testsuccess aptget install -y -s foo
  47     testfailure aptget install -y evil
  48     testsuccess aptget source foo --print-uris
  49
  50     LISTDIR=rootdir/var/lib/apt/lists
  51     testempty find "$LISTDIR" -name 'InRelease' -o -name 'Release.gpg'
  52 }
  53
  54 setupaptarchive_with_lists_clean()
  55 {
  56     setupaptarchive --no-update
  57     rm -rf rootdir/var/lib/apt/lists
  58 }
  59
  60 test_from_inrelease_to_unsigned()
  61 {
  62     # setup archive with InRelease file
  63     setupaptarchive_with_lists_clean
  64     testsuccess aptget update
  65     listcurrentlistsdirectory > lists.before
  66
  67     simulate_mitm_and_inject_evil_package
  68     assert_update_is_refused_and_last_good_state_used
  69     testfileequal lists.before "$(listcurrentlistsdirectory)"
  70 }
  71
  72 test_from_release_gpg_to_unsigned()
  73 {
  74     # setup archive with Release/Release.gpg (but no InRelease)
  75     setupaptarchive_with_lists_clean
  76     rm "$APTARCHIVE/dists/unstable/InRelease"
  77     testsuccess aptget update
  78     listcurrentlistsdirectory > lists.before
  79
  80     simulate_mitm_and_inject_evil_package
  81     assert_update_is_refused_and_last_good_state_used
  82     testfileequal lists.before "$(listcurrentlistsdirectory)"
  83 }
  84
  85 test_from_inrelease_to_unsigned_with_override()
  86 {
  87     # setup archive with InRelease file
  88     setupaptarchive_with_lists_clean
  89     testsuccess aptget update
  90
  91     # simulate moving to a unsigned but otherwise valid repo
  92     simulate_mitm_and_inject_evil_package
  93     generatereleasefiles '+2 hours'
  94     find "$APTARCHIVE" -name '*Packages*' -exec touch -d '+2 hours' {} \;
  95
  96     # and ensure we can update to it (with enough force)
  97     testwarning aptget update --allow-insecure-repositories \
  98         -o Acquire::AllowDowngradeToInsecureRepositories=1 -o Debug::pkgAcquire::Worker=1 -o Debug::pkgAcquire::Auth=1
  99     # but that the individual packages are still considered untrusted
 100     testfailureequal "WARNING: The following packages cannot be authenticated!
 101   evil
 102 E: There were unauthenticated packages and -y was used without --allow-unauthenticated" aptget install -qq -y evil
 103 }
 104
 105 test_cve_2012_0214()
 106 {
 107     # see https://bugs.launchpad.net/ubuntu/+source/apt/+bug/947108
 108     #
 109     # it was possible to MITM the download so that InRelease/Release.gpg
 110     # are not delivered (404) and a altered Release file was send
 111     #
 112     # apt left the old InRelease file in /var/lib/apt/lists and downloaded
 113     # the unauthenticated Release file too giving the false impression that
 114     # Release was authenticated
 115     #
 116     # Note that this is pretty much impossible nowadays because:
 117     # a) InRelease is left as is, not split to InRelease/Release as it was
 118     #    in the old days
 119     # b) we refuse to go from signed->unsigned
 120     #
 121     # Still worth having a regression test the simulates the condition
 122
 123     # setup archive with InRelease
 124     setupaptarchive_with_lists_clean
 125     testsuccess aptget update
 126     listcurrentlistsdirectory > lists.before
 127
 128     # do what CVE-2012-0214 did
 129     rm "$APTARCHIVE/dists/unstable/InRelease"
 130     rm "$APTARCHIVE/dists/unstable/Release.gpg"
 131     inject_evil_package
 132     # build valid Release file
 133     aptftparchive -qq release ./aptarchive > aptarchive/dists/unstable/Release
 134
 135     assert_update_is_refused_and_last_good_state_used
 136     testfileequal lists.before "$(listcurrentlistsdirectory)"
 137
 138     # ensure there is no _Release file downloaded
 139     testfailure ls rootdir/var/lib/apt/lists/*_Release
 140 }
 141
 142 test_subvert_inrelease()
 143 {
 144     # setup archive with InRelease
 145     setupaptarchive_with_lists_clean
 146     testsuccess aptget update
 147     listcurrentlistsdirectory > lists.before
 148
 149     # replace InRelease with something else
 150     mv "$APTARCHIVE/dists/unstable/Release" "$APTARCHIVE/dists/unstable/InRelease"
 151
 152     testfailuremsg "W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
 153 E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update
 154
 155     # ensure we keep the repo
 156     testfileequal lists.before "$(listcurrentlistsdirectory)"
 157     assert_repo_is_intact
 158 }
 159
 160 test_inrelease_to_invalid_inrelease()
 161 {
 162     # setup archive with InRelease
 163     setupaptarchive_with_lists_clean
 164     testsuccess aptget update
 165     listcurrentlistsdirectory > lists.before
 166
 167     # now remove InRelease and subvert Release do no longer verify
 168     sed -i 's/^Codename:.*/Codename: evil!/' "$APTARCHIVE/dists/unstable/InRelease"
 169     inject_evil_package
 170
 171     testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file:${APTARCHIVE} unstable InRelease: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 172 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 173 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 174
 175     # ensure we keep the repo
 176     testfailure grep 'evil' rootdir/var/lib/apt/lists/*InRelease
 177     testfileequal lists.before "$(listcurrentlistsdirectory)"
 178     assert_repo_is_intact
 179 }
 180
 181 test_release_gpg_to_invalid_release_release_gpg()
 182 {
 183     # setup archive with InRelease
 184     setupaptarchive_with_lists_clean
 185     rm "$APTARCHIVE/dists/unstable/InRelease"
 186     testsuccess aptget update
 187     listcurrentlistsdirectory > lists.before
 188
 189     # now subvert Release do no longer verify
 190     echo "Some evil data" >> "$APTARCHIVE/dists/unstable/Release"
 191     inject_evil_package
 192
 193     testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file:${APTARCHIVE} unstable Release: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 194 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/Release.gpg  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 195 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 196
 197     testfailure grep 'evil' rootdir/var/lib/apt/lists/*Release
 198     testfileequal lists.before "$(listcurrentlistsdirectory)"
 199     assert_repo_is_intact
 200 }
 201
 202
 203 TESTDIR=$(readlink -f $(dirname $0))
 204 . $TESTDIR/framework
 205
 206 setupenvironment
 207 configarchitecture "i386"
 208
 209 # a "normal" package with source and binary
 210 buildsimplenativepackage 'foo' 'all' '2.0'
 211
 212 # setup the archive and ensure we have a single package that installs fine
 213 setupaptarchive
 214 APTARCHIVE="$(readlink -f ./aptarchive)"
 215 assert_repo_is_intact
 216
 217 # test the various cases where a repo may go from signed->unsigned
 218 msgmsg "test_from_inrelease_to_unsigned"
 219 test_from_inrelease_to_unsigned
 220
 221 msgmsg "test_from_release_gpg_to_unsigned"
 222 test_from_release_gpg_to_unsigned
 223
 224 # ensure we do not regress on CVE-2012-0214
 225 msgmsg "test_cve_2012_0214"
 226 test_cve_2012_0214
 227
 228 # ensure InRelase can not be subverted
 229 msgmsg "test_subvert_inrelease"
 230 test_subvert_inrelease
 231
 232 # ensure we revert to last good state if InRelease does not verify
 233 msgmsg "test_inrelease_to_invalid_inrelease"
 234 test_inrelease_to_invalid_inrelease
 235
 236 # ensure we revert to last good state if Release/Release.gpg does not verify
 237 msgmsg "test_release_gpg_to_invalid_release_release_gpg"
 238 test_release_gpg_to_invalid_release_release_gpg
 239
 240 # ensure we can override the downgrade error
 241 msgmsg "test_from_inrelease_to_unsigned_with_override"
 242 test_from_inrelease_to_unsigned_with_override