reportbug before 6.4.4+deb7u1 and 6.5.x before 6.5.0+nmu1 allows remote attackers to execute arbitrary commands via vectors related to compare_versions and reportbug/checkversions.py.
Improper Control of Generation of Code The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.