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Merge pull request #3001 from from gilles-peskine-arm/coverity-20200115-2.16 into mbedtls-2.16

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This commit is contained in:
Janos Follath 2020-01-29 14:49:23 +00:00
parent 1f10f2e282 75aab5276f
commit bac9f1bfb0
6 changed files with 18 additions and 15 deletions
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3
ChangeLog
View file

@ -5,6 +5,7 @@ mbed TLS ChangeLog (Sorted per branch, date)
Bugfix
* Allow loading symlinked certificates. Fixes #3005. Reported and fixed
by Jonathan Bennett <JBennett@incomsystems.biz> via #3008.
* Fix an unchecked call to mbedtls_md() in the x509write module.
Security
* Fix potential memory overread when performing an ECDSA signature
@ -14,6 +15,8 @@ Security
denial of service (application crash or extra resource consumption).
Found by Auke Zeilstra and Peter Schwabe, using static analysis.
Bugfix
= mbed TLS 2.16.4 branch released 2020-01-15
Security

14
library/cipher.c
View file

@ -361,6 +361,10 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
*olen = 0;
block_size = mbedtls_cipher_get_block_size( ctx );
if ( 0 == block_size )
{
return( MBEDTLS_ERR_CIPHER_INVALID_CONTEXT );
}
if( ctx->cipher_info->mode == MBEDTLS_MODE_ECB )
{
@ -396,11 +400,6 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
}
#endif
if ( 0 == block_size )
{
return( MBEDTLS_ERR_CIPHER_INVALID_CONTEXT );
}
if( input == output &&
( ctx->unprocessed_len != 0 || ilen % block_size ) )
{
@ -459,11 +458,6 @@ int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *i
*/
if( 0 != ilen )
{
if( 0 == block_size )
{
return( MBEDTLS_ERR_CIPHER_INVALID_CONTEXT );
}
/* Encryption: only cache partial blocks
* Decryption w/ padding: always keep at least one whole block
* Decryption w/o padding: only cache partial blocks

4
library/x509write_csr.c
View file

@ -226,7 +226,9 @@ int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, s
/*
* Prepare signature
*/
mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
ret = mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
if( ret != 0 )
return( ret );
if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len,
f_rng, p_rng ) ) != 0 )

4
tests/suites/test_suite_ecdsa.function
View file

@ -527,7 +527,9 @@ void ecdsa_write_restart( int id, char *d_str, int md_alg,
TEST_ASSERT( md_info != NULL );
hlen = mbedtls_md_get_size( md_info );
mbedtls_md( md_info, (const unsigned char *) msg, strlen( msg ), hash );
TEST_ASSERT( mbedtls_md( md_info,
(const unsigned char *) msg, strlen( msg ),
hash ) == 0 );
mbedtls_ecp_set_max_ops( max_ops );

4
tests/suites/test_suite_mpi.function
View file

@ -550,8 +550,8 @@ void mbedtls_mpi_lt_mpi_ct( int size_X, char * input_X,
TEST_ASSERT( mbedtls_mpi_read_string( &X, 16, input_X ) == 0 );
TEST_ASSERT( mbedtls_mpi_read_string( &Y, 16, input_Y ) == 0 );
mbedtls_mpi_grow( &X, size_X );
mbedtls_mpi_grow( &Y, size_Y );
TEST_ASSERT( mbedtls_mpi_grow( &X, size_X ) == 0 );
TEST_ASSERT( mbedtls_mpi_grow( &Y, size_Y ) == 0 );
TEST_ASSERT( mbedtls_mpi_lt_mpi_ct( &X, &Y, &ret ) == input_err );
if( input_err == 0 )

4
tests/suites/test_suite_pk.function
View file

@ -712,7 +712,9 @@ void pk_sign_verify_restart( int pk_type, int grp_id, char *d_str,
TEST_ASSERT( md_info != NULL );
hlen = mbedtls_md_get_size( md_info );
mbedtls_md( md_info, (const unsigned char *) msg, strlen( msg ), hash );
TEST_ASSERT( mbedtls_md( md_info,
(const unsigned char *) msg, strlen( msg ),
hash ) == 0 );
mbedtls_ecp_set_max_ops( max_ops );