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 "$APTARCHIVE/dists/unstable/InRelease" "$APTARCHIVE/dists/unstable/Release.gpg"
  13     inject_evil_package
  14 }
  15
  16 inject_evil_package()
  17 {
  18     cat > "$APTARCHIVE/dists/unstable/main/binary-i386/Packages" <<EOF
  19 Package: evil
  20 Installed-Size: 29
  21 Maintainer: Joe Sixpack <joe@example.org>
  22 Architecture: all
  23 Version: 1.0
  24 Filename: pool/evil_1.0_all.deb
  25 Size: 1270
  26 Description: an autogenerated evil package
  27 EOF
  28     # avoid ims hit
  29     touch -d '+1hour' aptarchive/dists/unstable/main/binary-i386/Packages
  30     compressfile aptarchive/dists/unstable/main/binary-i386/Packages
  31 }
  32
  33 assert_update_is_refused_and_last_good_state_used()
  34 {
  35     testfailuremsg "E: The repository 'file:${APTARCHIVE} unstable Release' is no longer signed.
  36 N: Updating from such a repository can't be done securely, and is therefore disabled by default.
  37 N: See apt-secure(8) manpage for repository creation and user configuration details." aptget update
  38
  39     assert_repo_is_intact
  40 }
  41
  42 assert_repo_is_intact()
  43 {
  44     testsuccessequal "foo/unstable 2.0 all" apt list -qq
  45     testsuccess aptget install -y -s foo
  46     testfailure aptget install -y evil
  47     testsuccess aptget source foo --print-uris
  48
  49     LISTDIR=rootdir/var/lib/apt/lists
  50     testempty find "$LISTDIR" -name 'InRelease' -o -name 'Release.gpg'
  51 }
  52
  53 setupaptarchive_with_lists_clean()
  54 {
  55     setupaptarchive --no-update
  56     rm -rf rootdir/var/lib/apt/lists
  57 }
  58
  59 test_from_inrelease_to_unsigned()
  60 {
  61     export APT_DONT_SIGN='Release.gpg'
  62     setupaptarchive_with_lists_clean
  63     testsuccess aptget update
  64     listcurrentlistsdirectory > lists.before
  65
  66     simulate_mitm_and_inject_evil_package
  67     assert_update_is_refused_and_last_good_state_used
  68     testfileequal lists.before "$(listcurrentlistsdirectory)"
  69 }
  70
  71 test_from_release_gpg_to_unsigned()
  72 {
  73     export APT_DONT_SIGN='InRelease'
  74     setupaptarchive_with_lists_clean
  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 "$(listcurrentlistsdirectory)"
  81 }
  82
  83 test_from_inrelease_to_unsigned_with_override()
  84 {
  85     export APT_DONT_SIGN='Release.gpg'
  86     # setup archive with InRelease file
  87     setupaptarchive_with_lists_clean
  88     testsuccess aptget update
  89
  90     # simulate moving to a unsigned but otherwise valid repo
  91     simulate_mitm_and_inject_evil_package
  92     generatereleasefiles '+2 hours'
  93     find "$APTARCHIVE" -name '*Packages*' -exec touch -d '+2 hours' {} \;
  94
  95     # and ensure we can update to it (with enough force)
  96     testwarning aptget update --allow-insecure-repositories \
  97         -o Acquire::AllowDowngradeToInsecureRepositories=1 -o Debug::pkgAcquire::Worker=1 -o Debug::pkgAcquire::Auth=1
  98     # but that the individual packages are still considered untrusted
  99     testfailureequal "WARNING: The following packages cannot be authenticated!
 100   evil
 101 E: There were unauthenticated packages and -y was used without --allow-unauthenticated" aptget install -qq -y evil
 102 }
 103
 104 test_cve_2012_0214()
 105 {
 106     # see https://bugs.launchpad.net/ubuntu/+source/apt/+bug/947108
 107     #
 108     # it was possible to MITM the download so that InRelease/Release.gpg
 109     # are not delivered (404) and a altered Release file was send
 110     #
 111     # apt left the old InRelease file in /var/lib/apt/lists and downloaded
 112     # the unauthenticated Release file too giving the false impression that
 113     # Release was authenticated
 114     #
 115     # Note that this is pretty much impossible nowadays because:
 116     # a) InRelease is left as is, not split to InRelease/Release as it was
 117     #    in the old days
 118     # b) we refuse to go from signed->unsigned
 119     #
 120     # Still worth having a regression test the simulates the condition
 121
 122     export APT_DONT_SIGN='Release.gpg'
 123     setupaptarchive_with_lists_clean
 124     testsuccess aptget update
 125     listcurrentlistsdirectory > lists.before
 126
 127     # do what CVE-2012-0214 did
 128     rm -f "$APTARCHIVE/dists/unstable/InRelease" "$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 "$(listcurrentlistsdirectory)"
 135
 136     # ensure there is no _Release file downloaded
 137     testfailure ls rootdir/var/lib/apt/lists/*_Release
 138 }
 139
 140 test_subvert_inrelease()
 141 {
 142     export APT_DONT_SIGN='Release.gpg'
 143     setupaptarchive_with_lists_clean
 144     testsuccess aptget update
 145     listcurrentlistsdirectory > lists.before
 146
 147     # replace InRelease with something else
 148     mv "$APTARCHIVE/dists/unstable/Release" "$APTARCHIVE/dists/unstable/InRelease"
 149
 150     testfailuremsg "E: Failed to fetch file:${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 "$(listcurrentlistsdirectory)"
 155     assert_repo_is_intact
 156 }
 157
 158 test_inrelease_to_invalid_inrelease()
 159 {
 160     export APT_DONT_SIGN='Release.gpg'
 161     setupaptarchive_with_lists_clean
 162     testsuccess aptget update
 163     listcurrentlistsdirectory > lists.before
 164
 165     # now remove InRelease and subvert Release do no longer verify
 166     sed -i 's/^Codename:.*/Codename: evil!/' "$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 "$(listcurrentlistsdirectory)"
 176     assert_repo_is_intact
 177 }
 178
 179 test_release_gpg_to_invalid_release_release_gpg()
 180 {
 181     export APT_DONT_SIGN='InRelease'
 182     setupaptarchive_with_lists_clean
 183     testsuccess aptget update
 184     listcurrentlistsdirectory > lists.before
 185
 186     # now subvert Release do no longer verify
 187     echo "Some evil data" >> "$APTARCHIVE/dists/unstable/Release"
 188     inject_evil_package
 189
 190     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:${APTARCHIVE} unstable Release: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 191 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/Release.gpg  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 192 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 193
 194     testfailure grep 'evil' rootdir/var/lib/apt/lists/*Release
 195     testfileequal lists.before "$(listcurrentlistsdirectory)"
 196     assert_repo_is_intact
 197 }
 198
 199
 200 TESTDIR="$(readlink -f "$(dirname "$0")")"
 201 . "$TESTDIR/framework"
 202
 203 setupenvironment
 204 configarchitecture "i386"
 205
 206 # a "normal" package with source and binary
 207 buildsimplenativepackage 'foo' 'all' '2.0'
 208
 209 # setup the archive and ensure we have a single package that installs fine
 210 setupaptarchive
 211 APTARCHIVE="$(readlink -f ./aptarchive)"
 212 assert_repo_is_intact
 213
 214 # test the various cases where a repo may go from signed->unsigned
 215 msgmsg "test_from_inrelease_to_unsigned"
 216 test_from_inrelease_to_unsigned
 217
 218 msgmsg "test_from_release_gpg_to_unsigned"
 219 test_from_release_gpg_to_unsigned
 220
 221 # ensure we do not regress on CVE-2012-0214
 222 msgmsg "test_cve_2012_0214"
 223 test_cve_2012_0214
 224
 225 # ensure InRelease can not be subverted
 226 msgmsg "test_subvert_inrelease"
 227 test_subvert_inrelease
 228
 229 # ensure we revert to last good state if InRelease does not verify
 230 msgmsg "test_inrelease_to_invalid_inrelease"
 231 test_inrelease_to_invalid_inrelease
 232
 233 # ensure we revert to last good state if Release/Release.gpg does not verify
 234 msgmsg "test_release_gpg_to_invalid_release_release_gpg"
 235 test_release_gpg_to_invalid_release_release_gpg
 236
 237 # ensure we can override the downgrade error
 238 msgmsg "test_from_inrelease_to_unsigned_with_override"
 239 test_from_inrelease_to_unsigned_with_override