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