tor/bug24247 at a7ca71cf6b2fb46b049442569188ce046cfd6c34 - tor - Git with a cup of Datura seeds

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Nick Mathewson a7ca71cf6b Fix mock_crypto_pk_public_checksig__nocheck() to handle short RSA keys

This function -- a mock replacement used only for fuzzing -- would
have a buffer overflow if it got an RSA key whose modulus was under
20 bytes long.

Fortunately, Tor itself does not appear to have a bug here.

Fixes bug 24247; bugfix on 0.3.0.3-alpha when fuzzing was
introduced.  Found by OSS-Fuzz; this is OSS-Fuzz issue 4177.

2017-11-11 14:44:45 -05:00

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   o Minor bugfixes (fuzzing):
     - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(), to
       correctly handle cases where a caller gives it an RSA key of under 160
       bits. (This is not actually a bug in Tor itself, but wrather in our
       fuzzing code.)  Fixes bug 24247; bugfix on 0.3.0.3-alpha.
       Found by OSS-Fuzz as issue 4177.