lib/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-06-24 01:41:35 +03:00
Code Activity

Prevent signed integer overflow in CSR parsing

Browse Source 
Modify the function mbedtls_x509_csr_parse_der() so that it checks the
parsed CSR version integer before it increments the value. This prevents
a potential signed integer overflow, as these have undefined behaviour
in the C standard.
This commit is contained in:
Andres AG
2017-02-17 13:54:43 +00:00
committed by Simon Butcher
parent 7ca4a03955
commit 2e65a54d5a
2 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
library/x509_csr.c
View File

@ -168,14 +168,14 @@ int mbedtls_x509_csr_parse_der( mbedtls_x509_csr *csr,
return( ret );
}
csr->version++;
if( csr->version != 1 )
if( csr->version != 0 )
{
mbedtls_x509_csr_free( csr );
return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
}
csr->version++;
/*
* subject Name
*/