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| author | Julian Andres Klode <julian.klode@canonical.com> | 2020-12-04 12:37:19 +0100 |
|---|---|---|
| committer | Julian Andres Klode <julian.klode@canonical.com> | 2020-12-07 12:29:57 +0100 |
| commit | 29581d103fc85d988c1f8a9c995ef9a6bb600500 (patch) | |
| tree | 26da866f9fed111805c3c2cda3f3f96855a2c5b6 /test/integration/test-cve-2020-27350 | |
| parent | 66962a66970a1f816375620c89de7117a470a6af (diff) | |
tarfile: OOM hardening: Limit size of long names/links to 1 MiB
Tarballs have long names and long link targets structured by a
special tar header with a GNU extension followed by the actual
content (padded to 512 bytes). Essentially, think of a name as
a special kind of file.
The limit of a file size in a header is 12 bytes, aka 10**12
or 1 TB. While this works OK-ish for file content that we stream
to extractors, we need to copy file names into memory, and this
opens us up to an OOM DoS attack.
Limit the file name size to 1 MiB, as libarchive does, to make
things safer.
Diffstat (limited to 'test/integration/test-cve-2020-27350')
| -rwxr-xr-x | test/integration/test-cve-2020-27350 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/test/integration/test-cve-2020-27350 b/test/integration/test-cve-2020-27350 index 6ee867bb3..336dc5b7e 100755 --- a/test/integration/test-cve-2020-27350 +++ b/test/integration/test-cve-2020-27350 @@ -11,3 +11,9 @@ testequal "E: Invalid archive member header" runapt ${APTTESTHELPERSBINDIR}/test ${APTTESTHELPERSBINDIR}/createdeb-cve-2020-27350 loop loop.deb testequal "E: Invalid archive member header" runapt ${APTTESTHELPERSBINDIR}/testdeb ./loop.deb + +${APTTESTHELPERSBINDIR}/createdeb-cve-2020-27350 long-name long-name.deb +testequal "E: Long name to large: 67108865 bytes > 1048576 bytes" runapt ${APTTESTHELPERSBINDIR}/extract-control long-name.deb control + +${APTTESTHELPERSBINDIR}/createdeb-cve-2020-27350 long-link long-link.deb +testequal "E: Long name to large: 67108865 bytes > 1048576 bytes" runapt ${APTTESTHELPERSBINDIR}/extract-control long-link.deb control |