diff options
| author | Filippo Valsorda <filippo@cloudflare.com> | 2015-12-14 02:18:13 +0000 |
|---|---|---|
| committer | Filippo Valsorda <filippo@cloudflare.com> | 2016-01-21 20:12:17 +0000 |
| commit | 4d318be1951d6bbae0eae7aff69a58de353c8337 (patch) | |
| tree | 264c7d7fde6b7ce9bf96d20cc5eb9e3bf7ad51b4 /test | |
| parent | 6b45f9aba2dad6e965ab51b4d18f4bb05336eaf1 (diff) | |
[update] fix (unexploitable) BB'06 vulnerability in rsa_verify
The rsa_verify code was vulnerable to a BB'06 attack, allowing to forge
signatures for arbitrary messages if and only if the public key exponent is
3. Since the updates key is hardcoded to 65537, there is no risk for
youtube-dl, but I don't want vulnerable code in the wild.
The new function adopts a way safer approach of encoding-and-comparing to
replace the dangerous parsing code.
Diffstat (limited to 'test')
| -rw-r--r-- | test/test_update.py | 30 | ||||
| -rw-r--r-- | test/versions.json | 34 |
2 files changed, 64 insertions, 0 deletions
diff --git a/test/test_update.py b/test/test_update.py new file mode 100644 index 000000000..d9c71511d --- /dev/null +++ b/test/test_update.py @@ -0,0 +1,30 @@ +#!/usr/bin/env python + +from __future__ import unicode_literals + +# Allow direct execution +import os +import sys +import unittest +sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) + + +import json +from youtube_dl.update import rsa_verify + + +class TestUpdate(unittest.TestCase): + def test_rsa_verify(self): + UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537) + with open(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'versions.json'), 'rb') as f: + versions_info = f.read().decode() + versions_info = json.loads(versions_info) + signature = versions_info['signature'] + del versions_info['signature'] + self.assertTrue(rsa_verify( + json.dumps(versions_info, sort_keys=True).encode('utf-8'), + signature, UPDATES_RSA_KEY)) + + +if __name__ == '__main__': + unittest.main() diff --git a/test/versions.json b/test/versions.json new file mode 100644 index 000000000..6cccc2259 --- /dev/null +++ b/test/versions.json @@ -0,0 +1,34 @@ +{ + "latest": "2013.01.06", + "signature": "72158cdba391628569ffdbea259afbcf279bbe3d8aeb7492690735dc1cfa6afa754f55c61196f3871d429599ab22f2667f1fec98865527b32632e7f4b3675a7ef0f0fbe084d359256ae4bba68f0d33854e531a70754712f244be71d4b92e664302aa99653ee4df19800d955b6c4149cd2b3f24288d6e4b40b16126e01f4c8ce6", + "versions": { + "2013.01.02": { + "bin": [ + "http://youtube-dl.org/downloads/2013.01.02/youtube-dl", + "f5b502f8aaa77675c4884938b1e4871ebca2611813a0c0e74f60c0fbd6dcca6b" + ], + "exe": [ + "http://youtube-dl.org/downloads/2013.01.02/youtube-dl.exe", + "75fa89d2ce297d102ff27675aa9d92545bbc91013f52ec52868c069f4f9f0422" + ], + "tar": [ + "http://youtube-dl.org/downloads/2013.01.02/youtube-dl-2013.01.02.tar.gz", + "6a66d022ac8e1c13da284036288a133ec8dba003b7bd3a5179d0c0daca8c8196" + ] + }, + "2013.01.06": { + "bin": [ + "http://youtube-dl.org/downloads/2013.01.06/youtube-dl", + "64b6ed8865735c6302e836d4d832577321b4519aa02640dc508580c1ee824049" + ], + "exe": [ + "http://youtube-dl.org/downloads/2013.01.06/youtube-dl.exe", + "58609baf91e4389d36e3ba586e21dab882daaaee537e4448b1265392ae86ff84" + ], + "tar": [ + "http://youtube-dl.org/downloads/2013.01.06/youtube-dl-2013.01.06.tar.gz", + "fe77ab20a95d980ed17a659aa67e371fdd4d656d19c4c7950e7b720b0c2f1a86" + ] + } + } +}
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