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Applying same fix as in dtls1_process_out_of_seq_message. A truncated DTLS fragment would cause *ok to be clear, but the return value would still be the number of bytes read.

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Problem identified by Emilia Käsper, based on previous issue/patch by Adam
Langley.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
This commit is contained in:
Matt Caswell 2014-07-24 23:54:28 +01:00
parent 60be115771
commit e5861c885f
1 changed files with 3 additions and 1 deletions
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4
ssl/d1_both.c
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@ -663,7 +663,9 @@ dtls1_reassemble_fragment(SSL *s, struct hm_header_st* msg_hdr, int *ok)
/* read the body of the fragment (header has already been read */ /* read the body of the fragment (header has already been read */
i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
frag->fragment + msg_hdr->frag_off,frag_len,0); frag->fragment + msg_hdr->frag_off,frag_len,0);
if (i<=0 || (unsigned long)i!=frag_len) if ((unsigned long)i!=frag_len)
i=-1;
if (i<=0)
goto err; goto err;
RSMBLY_BITMASK_MARK(frag->reassembly, (long)msg_hdr->frag_off, RSMBLY_BITMASK_MARK(frag->reassembly, (long)msg_hdr->frag_off,