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     rm -f $APTARCHIVE/dists/unstable/InRelease
  12     rm -f $APTARCHIVE/dists/unstable/Release.gpg
  13     inject_evil_package
  14 }
  15
  16 inject_evil_package()
  17 {
  18     cat > $APTARCHIVE/dists/unstable/main/binary-i386/Packages <<EOF
  19 Package: evil
  20 Installed-Size: 29
  21 Maintainer: Joe Sixpack <joe@example.org>
  22 Architecture: all
  23 Version: 1.0
  24 Filename: pool/evil_1.0_all.deb
  25 Size: 1270
  26 Description: an autogenerated evil package
  27 EOF
  28     # avoid ims hit
  29     touch -d '+1hour' aptarchive/dists/unstable/main/binary-i386/Packages
  30 }
  31
  32 assert_update_is_refused_and_last_good_state_used()
  33 {
  34     testfailureequal "E: The repository 'file: unstable Release.gpg' is no longer signed." aptget update -qq
  35
  36     assert_repo_is_intact
  37 }
  38
  39 assert_repo_is_intact()
  40 {
  41     testsuccessequal "foo/unstable 2.0 all" apt list -q
  42     testsuccess aptget install -y -s foo
  43     testfailure aptget install -y evil
  44     testsuccess aptget source foo --print-uris
  45
  46     LISTDIR=rootdir/var/lib/apt/lists
  47     if ! ( ls $LISTDIR/*InRelease >/dev/null 2>&1 ||
  48             ls $LISTDIR/*Release.gpg >/dev/null 2>&1 ); then
  49         echo "Can not find InRelease/Release.gpg in $(ls $LISTDIR)"
  50         msgfail
  51     fi
  52 }
  53
  54 setupaptarchive_with_lists_clean()
  55 {
  56     setupaptarchive --no-update
  57     rm -rf rootdir/var/lib/apt/lists
  58 }
  59
  60 test_from_inrelease_to_unsigned()
  61 {
  62     # setup archive with InRelease file
  63     setupaptarchive_with_lists_clean
  64     testsuccess aptget update
  65     listcurrentlistsdirectory > lists.before
  66
  67     simulate_mitm_and_inject_evil_package
  68     assert_update_is_refused_and_last_good_state_used
  69     testfileequal lists.before "$(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     # FIXME: is not what the server reported 4104 4106
  90     testsuccess aptget update #-o Debug::pkgAcquire::Worker=1
  91
  92     # simulate moving to a unsigned but otherwise valid repo
  93     simulate_mitm_and_inject_evil_package
  94     generatereleasefiles
  95
  96     # and ensure we can update to it (with enough force)
  97     testwarning aptget update --allow-insecure-repositories \
  98         -o Acquire::AllowDowngradeToInsecureRepositories=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 are problems and -y was used without --force-yes" 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 nowdays 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 $APTARCHIVE/dists/unstable/InRelease
 151
 152     testfailureequal "W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  Does not start with a cleartext signature
 153
 154 E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 155
 156     # ensure we keep the repo
 157     testfileequal lists.before "$(listcurrentlistsdirectory)"
 158     assert_repo_is_intact
 159 }
 160
 161 test_inrelease_to_invalid_inrelease()
 162 {
 163     # setup archive with InRelease
 164     setupaptarchive_with_lists_clean
 165     testsuccess aptget update
 166     listcurrentlistsdirectory > lists.before
 167
 168     # now remove InRelease and subvert Release do no longer verify
 169     sed -i 's/Codename.*/Codename: evil!'/ $APTARCHIVE/dists/unstable/InRelease
 170     inject_evil_package
 171
 172     testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file: unstable InRelease: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 173
 174 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 175
 176 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 177
 178     # ensure we keep the repo
 179     testfailure grep 'evil' rootdir/var/lib/apt/lists/*InRelease
 180     testfileequal lists.before "$(listcurrentlistsdirectory)"
 181     assert_repo_is_intact
 182 }
 183
 184 test_release_gpg_to_invalid_release_release_gpg()
 185 {
 186     # setup archive with InRelease
 187     setupaptarchive_with_lists_clean
 188     rm $APTARCHIVE/dists/unstable/InRelease
 189     testsuccess aptget update
 190     listcurrentlistsdirectory > lists.before
 191
 192     # now subvert Release do no longer verify
 193     echo "Some evil data" >>  $APTARCHIVE/dists/unstable/Release
 194     inject_evil_package
 195
 196     testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file: unstable Release.gpg: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 197
 198 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/Release.gpg  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 199
 200 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 201
 202     testfailure grep 'evil' rootdir/var/lib/apt/lists/*Release
 203     testfileequal lists.before "$(listcurrentlistsdirectory)"
 204     assert_repo_is_intact
 205 }
 206
 207
 208 TESTDIR=$(readlink -f $(dirname $0))
 209 . $TESTDIR/framework
 210
 211 setupenvironment
 212 configarchitecture "i386"
 213
 214 # a "normal" package with source and binary
 215 buildsimplenativepackage 'foo' 'all' '2.0'
 216
 217 # setup the archive and ensure we have a single package that installs fine
 218 setupaptarchive
 219 APTARCHIVE=$(readlink -f ./aptarchive)
 220 assert_repo_is_intact
 221
 222 # test the various cases where a repo may go from signed->unsigned
 223 msgmsg "test_from_inrelease_to_unsigned"
 224 test_from_inrelease_to_unsigned
 225
 226 msgmsg "test_from_release_gpg_to_unsigned"
 227 test_from_release_gpg_to_unsigned
 228
 229 # ensure we do not regress on CVE-2012-0214
 230 msgmsg "test_cve_2012_0214"
 231 test_cve_2012_0214
 232
 233 # ensure InRelase can not be subverted
 234 msgmsg "test_subvert_inrelease"
 235 test_subvert_inrelease
 236
 237 # ensure we revert to last good state if InRelease does not verify
 238 msgmsg "test_inrelease_to_invalid_inrelease"
 239 test_inrelease_to_invalid_inrelease
 240
 241 # ensure we revert to last good state if Release/Release.gpg does not verify
 242 msgmsg "test_release_gpg_to_invalid_release_release_gpg"
 243 test_release_gpg_to_invalid_release_release_gpg
 244
 245 # ensure we can override the downgrade error
 246 msgmsg "test_from_inrelease_to_unsigned_with_override"
 247 test_from_inrelease_to_unsigned_with_override