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 }
  32
  33 assert_update_is_refused_and_last_good_state_used()
  34 {
  35     testfailuremsg "E: The repository 'file: unstable Release' is no longer signed." aptget update
  36
  37     assert_repo_is_intact
  38 }
  39
  40 assert_repo_is_intact()
  41 {
  42     testsuccessequal "foo/unstable 2.0 all" apt list -q
  43     testsuccess aptget install -y -s foo
  44     testfailure aptget install -y evil
  45     testsuccess aptget source foo --print-uris
  46
  47     LISTDIR=rootdir/var/lib/apt/lists
  48     if ! ( ls $LISTDIR/*InRelease >/dev/null 2>&1 ||
  49             ls $LISTDIR/*Release.gpg >/dev/null 2>&1 ); then
  50         echo "Can not find InRelease/Release.gpg in $(ls $LISTDIR)"
  51         msgfail
  52     fi
  53 }
  54
  55 setupaptarchive_with_lists_clean()
  56 {
  57     setupaptarchive --no-update
  58     rm -rf rootdir/var/lib/apt/lists
  59 }
  60
  61 test_from_inrelease_to_unsigned()
  62 {
  63     # setup archive with InRelease file
  64     setupaptarchive_with_lists_clean
  65     testsuccess aptget update
  66     listcurrentlistsdirectory > lists.before
  67
  68     simulate_mitm_and_inject_evil_package
  69     assert_update_is_refused_and_last_good_state_used
  70     testfileequal lists.before "$(listcurrentlistsdirectory)"
  71 }
  72
  73 test_from_release_gpg_to_unsigned()
  74 {
  75     # setup archive with Release/Release.gpg (but no InRelease)
  76     setupaptarchive_with_lists_clean
  77     rm $APTARCHIVE/dists/unstable/InRelease
  78     testsuccess aptget update
  79     listcurrentlistsdirectory > lists.before
  80
  81     simulate_mitm_and_inject_evil_package
  82     assert_update_is_refused_and_last_good_state_used
  83     testfileequal lists.before "$(listcurrentlistsdirectory)"
  84 }
  85
  86 test_from_inrelease_to_unsigned_with_override()
  87 {
  88     # setup archive with InRelease file
  89     setupaptarchive_with_lists_clean
  90     # FIXME: is not what the server reported 4104 4106
  91     testsuccess aptget update #-o Debug::pkgAcquire::Worker=1
  92
  93     # simulate moving to a unsigned but otherwise valid repo
  94     simulate_mitm_and_inject_evil_package
  95     generatereleasefiles
  96
  97     # and ensure we can update to it (with enough force)
  98     testwarning aptget update --allow-insecure-repositories \
  99         -o Acquire::AllowDowngradeToInsecureRepositories=1
 100     # but that the individual packages are still considered untrusted
 101     testfailureequal "WARNING: The following packages cannot be authenticated!
 102   evil
 103 E: There are problems and -y was used without --force-yes" aptget install -qq -y evil
 104 }
 105
 106 test_cve_2012_0214()
 107 {
 108     # see https://bugs.launchpad.net/ubuntu/+source/apt/+bug/947108
 109     #
 110     # it was possible to MITM the download so that InRelease/Release.gpg
 111     # are not delivered (404) and a altered Release file was send
 112     #
 113     # apt left the old InRelease file in /var/lib/apt/lists and downloaded
 114     # the unauthenticated Release file too giving the false impression that
 115     # Release was authenticated
 116     #
 117     # Note that this is pretty much impossible nowdays because:
 118     # a) InRelease is left as is, not split to InRelease/Release as it was
 119     #    in the old days
 120     # b) we refuse to go from signed->unsigned
 121     #
 122     # Still worth having a regression test the simulates the condition
 123
 124     # setup archive with InRelease
 125     setupaptarchive_with_lists_clean
 126     testsuccess aptget update
 127     listcurrentlistsdirectory > lists.before
 128
 129     # do what CVE-2012-0214 did
 130     rm $APTARCHIVE/dists/unstable/InRelease
 131     rm $APTARCHIVE/dists/unstable/Release.gpg
 132     inject_evil_package
 133     # build valid Release file
 134     aptftparchive -qq release ./aptarchive > aptarchive/dists/unstable/Release
 135
 136     assert_update_is_refused_and_last_good_state_used
 137     testfileequal lists.before "$(listcurrentlistsdirectory)"
 138
 139     # ensure there is no _Release file downloaded
 140     testfailure ls rootdir/var/lib/apt/lists/*_Release
 141 }
 142
 143 test_subvert_inrelease()
 144 {
 145     # setup archive with InRelease
 146     setupaptarchive_with_lists_clean
 147     testsuccess aptget update
 148     listcurrentlistsdirectory > lists.before
 149
 150     # replace InRelease with something else
 151     mv $APTARCHIVE/dists/unstable/Release $APTARCHIVE/dists/unstable/InRelease
 152
 153     testfailureequal "W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  Does not start with a cleartext signature
 154
 155 E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 156
 157     # ensure we keep the repo
 158     testfileequal lists.before "$(listcurrentlistsdirectory)"
 159     assert_repo_is_intact
 160 }
 161
 162 test_inrelease_to_invalid_inrelease()
 163 {
 164     # setup archive with InRelease
 165     setupaptarchive_with_lists_clean
 166     testsuccess aptget update
 167     listcurrentlistsdirectory > lists.before
 168
 169     # now remove InRelease and subvert Release do no longer verify
 170     sed -i 's/Codename.*/Codename: evil!'/ $APTARCHIVE/dists/unstable/InRelease
 171     inject_evil_package
 172
 173     testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file: unstable InRelease: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 174
 175 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 176
 177 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 178
 179     # ensure we keep the repo
 180     testfailure grep 'evil' rootdir/var/lib/apt/lists/*InRelease
 181     testfileequal lists.before "$(listcurrentlistsdirectory)"
 182     assert_repo_is_intact
 183 }
 184
 185 test_release_gpg_to_invalid_release_release_gpg()
 186 {
 187     # setup archive with InRelease
 188     setupaptarchive_with_lists_clean
 189     rm $APTARCHIVE/dists/unstable/InRelease
 190     testsuccess aptget update
 191     listcurrentlistsdirectory > lists.before
 192
 193     # now subvert Release do no longer verify
 194     echo "Some evil data" >>  $APTARCHIVE/dists/unstable/Release
 195     inject_evil_package
 196
 197     testwarningequal "W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: file: unstable Release: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 198
 199 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/Release.gpg  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 200
 201 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 202
 203     testfailure grep 'evil' rootdir/var/lib/apt/lists/*Release
 204     testfileequal lists.before "$(listcurrentlistsdirectory)"
 205     assert_repo_is_intact
 206 }
 207
 208
 209 TESTDIR=$(readlink -f $(dirname $0))
 210 . $TESTDIR/framework
 211
 212 setupenvironment
 213 configarchitecture "i386"
 214
 215 # a "normal" package with source and binary
 216 buildsimplenativepackage 'foo' 'all' '2.0'
 217
 218 # setup the archive and ensure we have a single package that installs fine
 219 setupaptarchive
 220 APTARCHIVE=$(readlink -f ./aptarchive)
 221 assert_repo_is_intact
 222
 223 # test the various cases where a repo may go from signed->unsigned
 224 msgmsg "test_from_inrelease_to_unsigned"
 225 test_from_inrelease_to_unsigned
 226
 227 msgmsg "test_from_release_gpg_to_unsigned"
 228 test_from_release_gpg_to_unsigned
 229
 230 # ensure we do not regress on CVE-2012-0214
 231 msgmsg "test_cve_2012_0214"
 232 test_cve_2012_0214
 233
 234 # ensure InRelase can not be subverted
 235 msgmsg "test_subvert_inrelease"
 236 test_subvert_inrelease
 237
 238 # ensure we revert to last good state if InRelease does not verify
 239 msgmsg "test_inrelease_to_invalid_inrelease"
 240 test_inrelease_to_invalid_inrelease
 241
 242 # ensure we revert to last good state if Release/Release.gpg does not verify
 243 msgmsg "test_release_gpg_to_invalid_release_release_gpg"
 244 test_release_gpg_to_invalid_release_release_gpg
 245
 246 # ensure we can override the downgrade error
 247 msgmsg "test_from_inrelease_to_unsigned_with_override"
 248 test_from_inrelease_to_unsigned_with_override