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Merge remote-tracking branch 'upstream-public/pr/1450' into mbedtls-2.1-proposed

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This commit is contained in:
Jaeden Amero 2018-03-14 17:53:27 +00:00
parent 4e3629590f a7a8332402
commit 0980d9a3ae
2 changed files with 11 additions and 1 deletions
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4
ChangeLog
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@ -19,6 +19,8 @@ Security
resumption of the session).
* Fix a buffer overread in ssl_parse_server_key_exchange() that could cause
a crash on invalid input.
* Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a
crash on invalid input.
Features
* Extend PKCS#8 interface by introducing support for the entire SHA
@ -55,6 +57,8 @@ Bugfix
* In mbedtls_entropy_free(), properly free the message digest context.
* Fix a possible arithmetic overflow in ssl_parse_server_key_exchange()
that could cause a key exchange to fail on valid data.
* Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that
could cause a key exchange to fail on valid data.
Changes
* Clarified the documentation of mbedtls_ssl_setup.

8
library/ssl_cli.c
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@ -1850,10 +1850,16 @@ static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
*
* opaque psk_identity_hint<0..2^16-1>;
*/
if( (*p) > end - 2 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
"(psk_identity_hint length)" ) );
return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
}
len = (*p)[0] << 8 | (*p)[1];
*p += 2;
if( (*p) + len > end )
if( (*p) > end -len )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
"(psk_identity_hint length)" ) );