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Merge of fix for IOTSSL-481 - Double free

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Potential double free in mbedtls_ssl_conf_psk()
This commit is contained in:
Simon Butcher 2015-10-05 10:40:31 +01:00
commit fec73a8eec
2 changed files with 5 additions and 0 deletions
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3
ChangeLog
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@ -25,6 +25,9 @@ Security
* Fix possible heap buffer overflow in base64_encoded() when the input * Fix possible heap buffer overflow in base64_encoded() when the input
buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken, buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken,
Intelworks. Not trigerrable remotely in TLS. Intelworks. Not trigerrable remotely in TLS.
* Fix potential double-free if mbedtls_conf_psk() is called repeatedly on
the same mbedtls_ssl_config object and memory allocation fails. Found by
Guido Vranken, Intelworks. Cannot be forced remotely.
Changes Changes
* Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure

2
library/ssl_tls.c
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@ -5707,7 +5707,9 @@ int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
( conf->psk_identity = mbedtls_calloc( 1, psk_identity_len ) ) == NULL ) ( conf->psk_identity = mbedtls_calloc( 1, psk_identity_len ) ) == NULL )
{ {
mbedtls_free( conf->psk ); mbedtls_free( conf->psk );
mbedtls_free( conf->psk_identity );
conf->psk = NULL; conf->psk = NULL;
conf->psk_identity = NULL;
return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
} }