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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-02-20 15:57:45 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-02-20 16:06:53 +0100 |
| commit | a84db18fc71d09e801df0ebca048d82e90b32c6a (patch) | |
| tree | 1eda8cd659f78406f1b9f86d5e0b5757af20bad9 /testsuite | |
| parent | 95121d98e6da12599246d8e25c3f300e422a06fb (diff) | |
| download | busybox-a84db18fc71d09e801df0ebca048d82e90b32c6a.tar.gz | |
tar,unzip: postpone creation of symlinks with "suspicious" targets
This mostly reverts commit bc9bbeb2b81001e8731cd2ae501c8fccc8d87cc7
"libarchive: do not extract unsafe symlinks unless $EXTRACT_UNSAFE_SYMLINKS=1"
Users report that it is somewhat too restrictive. See
https://bugs.busybox.net/show_bug.cgi?id=8411
In particular, this interferes with unpacking of busybox-based
filesystems with links like "sbin/applet" -> "../bin/busybox".
The change is made smaller by deleting ARCHIVE_EXTRACT_QUIET flag -
it is unused since 2010, and removing conditionals on it
allows commonalizing some error message codes.
function old new delta
create_or_remember_symlink - 94 +94
create_symlinks_from_list - 64 +64
tar_main 1002 1006 +4
unzip_main 2732 2724 -8
data_extract_all 984 891 -93
unsafe_symlink_target 147 - -147
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 1/2 up/down: 162/-248) Total: -86 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'testsuite')
| -rwxr-xr-x | testsuite/tar.tests | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/testsuite/tar.tests b/testsuite/tar.tests index b7cd74ca5..1675b07b1 100755 --- a/testsuite/tar.tests +++ b/testsuite/tar.tests @@ -279,7 +279,7 @@ optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_BZ2 testing "tar does not extract into symlinks" "\ >>/tmp/passwd && uudecode -o input && tar xf input 2>&1 && rm passwd; cat /tmp/passwd; echo \$? " "\ -tar: skipping unsafe symlink to '/tmp/passwd' in archive, set EXTRACT_UNSAFE_SYMLINKS=1 to extract +tar: can't create symlink 'passwd' to '/tmp/passwd' 0 " \ "" "\ @@ -299,7 +299,7 @@ optional UUDECODE FEATURE_TAR_AUTODETECT FEATURE_SEAMLESS_BZ2 testing "tar -k does not extract into symlinks" "\ >>/tmp/passwd && uudecode -o input && tar xf input -k 2>&1 && rm passwd; cat /tmp/passwd; echo \$? " "\ -tar: skipping unsafe symlink to '/tmp/passwd' in archive, set EXTRACT_UNSAFE_SYMLINKS=1 to extract +tar: can't create symlink 'passwd' to '/tmp/passwd' 0 " \ "" "\ @@ -324,11 +324,11 @@ rm -rf etc usr ' "\ etc/ssl/certs/3b2716e5.0 etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem -tar: skipping unsafe symlink to '/usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt' in archive, set EXTRACT_UNSAFE_SYMLINKS=1 to extract etc/ssl/certs/f80cc7f6.0 usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt 0 etc/ssl/certs/3b2716e5.0 -> EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem +etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem -> /usr/share/ca-certificates/mozilla/EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.crt etc/ssl/certs/f80cc7f6.0 -> EBG_Elektronik_Sertifika_Hizmet_Sağlayıcısı.pem " \ "" "" @@ -346,9 +346,9 @@ ls symlink/bb_test_evilfile ' "\ anything.txt symlink -tar: skipping unsafe symlink to '/tmp' in archive, set EXTRACT_UNSAFE_SYMLINKS=1 to extract symlink/bb_test_evilfile -0 +tar: can't create symlink 'symlink' to '/tmp' +1 ls: /tmp/bb_test_evilfile: No such file or directory ls: bb_test_evilfile: No such file or directory symlink/bb_test_evilfile |