CVE-2017-17815: Improper Check for Unusual or Exceptional Conditions

December 21, 2017 (updated March 26, 2019)

In Netwide Assembler (NASM) rc0, there is an illegal address access in is_mmacro() in asm/preproc.c that will cause a remote denial of service attack, because of a missing check for the relationship between minimum and maximum parameter counts.

References

repo.or.cz/nasm.git/commit/c9244eaadd05b27637cde06021bac3fa1d920aa3
bugzilla.nasm.us/show_bug.cgi?id=3392436
nvd.nist.gov/vuln/detail/CVE-2017-17815
usn.ubuntu.com/3694-1/

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