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| author | Rishi <rishi_devan@mail.com> | 2020-07-15 13:51:00 +0200 |
|---|---|---|
| committer | Petr Viktorin <pviktori@redhat.com> | 2020-07-15 17:28:12 +0200 |
| commit | bde4372aa1f39803f5c33f1415e88b000d403d00 (patch) | |
| tree | 9532089be9064f42f8e6a4a22bcac186fe8c3445 /Lib/tarfile.py | |
| parent | f52bf62fe12d46267e958f80dbe1f4425b55cd0f (diff) | |
| download | cpython-git-backport-5a8d121-3.5.tar.gz | |
[3.5] bpo-39017: Avoid infinite loop in the tarfile module (GH-21454)backport-5a8d121-3.5
Avoid infinite loop when reading specially crafted TAR files using the tarfile module
(CVE-2019-20907).
(cherry picked from commit 5a8d121a1f3ef5ad7c105ee378cc79a3eac0c7d4)
Co-authored-by: Rishi <rishi_devan@mail.com>
Diffstat (limited to 'Lib/tarfile.py')
| -rwxr-xr-x | Lib/tarfile.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/tarfile.py b/Lib/tarfile.py index 999a99b978..8015fae7a6 100755 --- a/Lib/tarfile.py +++ b/Lib/tarfile.py @@ -1221,6 +1221,8 @@ class TarInfo(object): length, keyword = match.groups() length = int(length) + if length == 0: + raise InvalidHeaderError("invalid header") value = buf[match.end(2) + 1:match.start(1) + length - 1] # Normally, we could just use "utf-8" as the encoding and "strict" |