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 "dpkg/now 1.16.2+fake all [installed,local]
  45 foo/unstable 2.0 all" apt list -qq
  46     testsuccess aptget install -y -s foo
  47     testfailure aptget install -y evil
  48     testsuccess aptget source foo --print-uris
  49
  50     LISTDIR=rootdir/var/lib/apt/lists
  51     testempty find "$LISTDIR" -name 'InRelease' -o -name 'Release.gpg'
  52 }
  53
  54 setupaptarchive_with_lists_clean()
  55 {
  56     setupaptarchive --no-update
  57     rm -rf rootdir/var/lib/apt/lists
  58 }
  59
  60 test_from_inrelease_to_unsigned()
  61 {
  62     export APT_DONT_SIGN='Release.gpg'
  63     setupaptarchive_with_lists_clean
  64     testsuccess aptget update
  65     listcurrentlistsdirectory > lists.before
  66
  67     simulate_mitm_and_inject_evil_package
  68     assert_update_is_refused_and_last_good_state_used
  69     testfileequal lists.before "$(listcurrentlistsdirectory)"
  70 }
  71
  72 test_from_release_gpg_to_unsigned()
  73 {
  74     export APT_DONT_SIGN='InRelease'
  75     setupaptarchive_with_lists_clean
  76     testsuccess aptget update
  77     listcurrentlistsdirectory > lists.before
  78
  79     simulate_mitm_and_inject_evil_package
  80     assert_update_is_refused_and_last_good_state_used
  81     testfileequal lists.before "$(listcurrentlistsdirectory)"
  82 }
  83
  84 test_from_inrelease_to_unsigned_with_override()
  85 {
  86     export APT_DONT_SIGN='Release.gpg'
  87     # setup archive with InRelease file
  88     setupaptarchive_with_lists_clean
  89     testsuccess aptget update
  90
  91     # simulate moving to a unsigned but otherwise valid repo
  92     simulate_mitm_and_inject_evil_package
  93     generatereleasefiles '+2 hours'
  94     find "$APTARCHIVE" -name '*Packages*' -exec touch -d '+2 hours' {} \;
  95
  96     # and ensure we can update to it (with enough force)
  97     testfailure apt update
  98     testfailure aptget update
  99     testfailure aptget update --allow-insecure-repositories
 100     testfailure aptget update --no-allow-insecure-repositories
 101     sed -i 's#^deb\(-src\)\? #deb\1 [allow-downgrade-to-insecure=yes] #' rootdir/etc/apt/sources.list.d/*
 102     testfailure aptget update --no-allow-insecure-repositories
 103     testfailure apt update
 104     testwarning apt update --allow-insecure-repositories \
 105         -o Debug::pkgAcquire::Worker=1 -o Debug::pkgAcquire::Auth=1
 106     sed -i 's#^deb\(-src\)\? \[allow-downgrade-to-insecure=yes\] #deb\1 #' rootdir/etc/apt/sources.list.d/*
 107     # but that the individual packages are still considered untrusted
 108     testfailureequal "WARNING: The following packages cannot be authenticated!
 109   evil
 110 E: There were unauthenticated packages and -y was used without --allow-unauthenticated" aptget install -qq -y evil
 111 }
 112
 113 test_from_inrelease_to_norelease_with_override()
 114 {
 115     # setup archive with InRelease file
 116     setupaptarchive_with_lists_clean
 117     testsuccess aptget update
 118
 119     # simulate moving to a unsigned but otherwise valid repo
 120     simulate_mitm_and_inject_evil_package
 121     find "$APTARCHIVE" -name '*Release*' -delete
 122     find "$APTARCHIVE" -name '*Packages*' -exec touch -d '+2 hours' {} \;
 123
 124     # and ensure we can update to it (with enough force)
 125     testfailure aptget update
 126     testfailure aptget update --allow-insecure-repositories
 127     testwarning aptget update --allow-insecure-repositories \
 128         -o Acquire::AllowDowngradeToInsecureRepositories=1 -o Debug::pkgAcquire::Worker=1 -o Debug::pkgAcquire::Auth=1
 129     # but that the individual packages are still considered untrusted
 130     testfailureequal "WARNING: The following packages cannot be authenticated!
 131   evil
 132 E: There were unauthenticated packages and -y was used without --allow-unauthenticated" aptget install -qq -y evil
 133 }
 134
 135 test_cve_2012_0214()
 136 {
 137     # see https://bugs.launchpad.net/ubuntu/+source/apt/+bug/947108
 138     #
 139     # it was possible to MITM the download so that InRelease/Release.gpg
 140     # are not delivered (404) and a altered Release file was send
 141     #
 142     # apt left the old InRelease file in /var/lib/apt/lists and downloaded
 143     # the unauthenticated Release file too giving the false impression that
 144     # Release was authenticated
 145     #
 146     # Note that this is pretty much impossible nowadays because:
 147     # a) InRelease is left as is, not split to InRelease/Release as it was
 148     #    in the old days
 149     # b) we refuse to go from signed->unsigned
 150     #
 151     # Still worth having a regression test the simulates the condition
 152
 153     export APT_DONT_SIGN='Release.gpg'
 154     setupaptarchive_with_lists_clean
 155     testsuccess aptget update
 156     listcurrentlistsdirectory > lists.before
 157
 158     # do what CVE-2012-0214 did
 159     rm -f "$APTARCHIVE/dists/unstable/InRelease" "$APTARCHIVE/dists/unstable/Release.gpg"
 160     inject_evil_package
 161     # build valid Release file
 162     aptftparchive -qq release ./aptarchive > aptarchive/dists/unstable/Release
 163
 164     assert_update_is_refused_and_last_good_state_used
 165     testfileequal lists.before "$(listcurrentlistsdirectory)"
 166
 167     # ensure there is no _Release file downloaded
 168     testfailure ls rootdir/var/lib/apt/lists/*_Release
 169 }
 170
 171 test_subvert_inrelease()
 172 {
 173     export APT_DONT_SIGN='Release.gpg'
 174     setupaptarchive_with_lists_clean
 175     testsuccess aptget update
 176     listcurrentlistsdirectory > lists.before
 177
 178     # replace InRelease with something else
 179     mv "$APTARCHIVE/dists/unstable/Release" "$APTARCHIVE/dists/unstable/InRelease"
 180
 181     testfailuremsg "E: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
 182 E: Some index files failed to download. They have been ignored, or old ones used instead." aptget update
 183
 184     # ensure we keep the repo
 185     testfileequal lists.before "$(listcurrentlistsdirectory)"
 186     assert_repo_is_intact
 187 }
 188
 189 test_inrelease_to_invalid_inrelease()
 190 {
 191     export APT_DONT_SIGN='Release.gpg'
 192     setupaptarchive_with_lists_clean
 193     testsuccess aptget update
 194     listcurrentlistsdirectory > lists.before
 195
 196     # now remove InRelease and subvert Release do no longer verify
 197     sed -i 's/^Codename:.*/Codename: evil!/' "$APTARCHIVE/dists/unstable/InRelease"
 198     inject_evil_package
 199
 200     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:${APTARCHIVE} unstable InRelease: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 201 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/InRelease  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 202 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 203
 204     # ensure we keep the repo
 205     testfailure grep 'evil' rootdir/var/lib/apt/lists/*InRelease
 206     testfileequal lists.before "$(listcurrentlistsdirectory)"
 207     assert_repo_is_intact
 208 }
 209
 210 test_release_gpg_to_invalid_release_release_gpg()
 211 {
 212     export APT_DONT_SIGN='InRelease'
 213     setupaptarchive_with_lists_clean
 214     testsuccess aptget update
 215     listcurrentlistsdirectory > lists.before
 216
 217     # now subvert Release do no longer verify
 218     echo "Some evil data" >> "$APTARCHIVE/dists/unstable/Release"
 219     inject_evil_package
 220
 221     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:${APTARCHIVE} unstable Release: The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 222 W: Failed to fetch file:${APTARCHIVE}/dists/unstable/Release.gpg  The following signatures were invalid: BADSIG 5A90D141DBAC8DAE Joe Sixpack (APT Testcases Dummy) <joe@example.org>
 223 W: Some index files failed to download. They have been ignored, or old ones used instead." aptget update -qq
 224
 225     testfailure grep 'evil' rootdir/var/lib/apt/lists/*Release
 226     testfileequal lists.before "$(listcurrentlistsdirectory)"
 227     assert_repo_is_intact
 228 }
 229
 230
 231 TESTDIR="$(readlink -f "$(dirname "$0")")"
 232 . "$TESTDIR/framework"
 233
 234 setupenvironment
 235 configarchitecture "i386"
 236
 237 # a "normal" package with source and binary
 238 buildsimplenativepackage 'foo' 'all' '2.0'
 239
 240 # setup the archive and ensure we have a single package that installs fine
 241 setupaptarchive
 242 APTARCHIVE="$(readlink -f ./aptarchive)"
 243 assert_repo_is_intact
 244
 245 # test the various cases where a repo may go from signed->unsigned
 246 msgmsg "test_from_inrelease_to_unsigned"
 247 test_from_inrelease_to_unsigned
 248
 249 msgmsg "test_from_release_gpg_to_unsigned"
 250 test_from_release_gpg_to_unsigned
 251
 252 # ensure we do not regress on CVE-2012-0214
 253 msgmsg "test_cve_2012_0214"
 254 test_cve_2012_0214
 255
 256 # ensure InRelease can not be subverted
 257 msgmsg "test_subvert_inrelease"
 258 test_subvert_inrelease
 259
 260 # ensure we revert to last good state if InRelease does not verify
 261 msgmsg "test_inrelease_to_invalid_inrelease"
 262 test_inrelease_to_invalid_inrelease
 263
 264 # ensure we revert to last good state if Release/Release.gpg does not verify
 265 msgmsg "test_release_gpg_to_invalid_release_release_gpg"
 266 test_release_gpg_to_invalid_release_release_gpg
 267
 268 # ensure we can override the downgrade error
 269 msgmsg "test_from_inrelease_to_unsigned_with_override"
 270 test_from_inrelease_to_unsigned_with_override
 271 msgmsg "test_from_inrelease_to_norelease_with_override"
 272 test_from_inrelease_to_norelease_with_override