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Missing Error Check in function SSL_CTX_new() #4292

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@lc3412

Function SSL_CTX_new() returns NULL if the creation of a new SSL_CTX object failed. However , the return value of function SSL_CTX_new() is not checked. See the following code:

line : 1166

ssl_ctx = SSL_CTX_new(SSLv23_client_method());
/* For some reason this does not seem to work, but indications are that it should...
Maybe something with how we create connections? TODO: Fix it... */
SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_NONE, cert_verify_callback);
if (cipher != (char *)0) {
if (!SSL_CTX_set_cipher_list(ssl_ctx, cipher)) {
(void)fprintf(stderr, "%s: cannot set cipher list\n", argv0);
ERR_print_errors_fp(stderr);
close_connection(cnum);
return;
}
}

==============================================================================

We find the return value of this call been checked in openssl project with the version of openssl 1.1.2.
Such as in openssl/apps folder

line : 178
Ref : https://github.com/openssl/openssl/blob/0db957dbbcf6a432086ab913378c23636d8c374c/apps/ciphers.c#L178-L180

line 178:    ctx = SSL_CTX_new(meth);
line 179:    if (ctx == NULL)
line 180:        goto err;

Chi Li, Zuxing Gu, Jiecheng Wu

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