The function ASN1_STRING_print_ex does not properly validate the lengths of BMPString or UniversalString objects before attempting to print them.
An application which attempts to print a BMPString or UniversalString which has an invalid length will crash as a result of OpenSSL accessing invalid memory locations. This could be used by an attacker to crash a remote application.
No workaround is available, but applications which do not use the ASN1_STRING_print_ex function (either directly or indirectly) are not affected.
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