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