A vulnerability has been reported in Hashcash, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially to compromise a vulnerable system.
The vulnerability is caused due to an memory allocation error within the "array_push()" function in hashcash.c. This can potentially be exploited to cause a heap-based buffer overflow via a large number of "-r" or "-j" command line options passed to the application, or via a large number of resource names passed to the application with it is run with the "-m" option.
Successful exploitation requires that the application is configured to accept command line options or resource names from non-trusted sources.
The vulnerability has been reported in version 1.20. Prior versions may also be affected.
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