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Prevent arithmetic overflow on bounds check

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This commit is contained in:
Krzysztof Stachowiak 2018-03-14 11:21:35 +01:00
parent 9e1839bc43
commit 8e0b1166b6
1 changed files with 1 additions and 1 deletions
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library/ssl_cli.c
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@ -2066,7 +2066,7 @@ static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
len = (*p)[0] << 8 | (*p)[1]; len = (*p)[0] << 8 | (*p)[1];
*p += 2; *p += 2;
if( (*p) + len > end ) if( (*p) > end - len )
{ {
MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message " MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
"(psk_identity_hint length)" ) ); "(psk_identity_hint length)" ) );