Multiple vulnerabilities has been discovered and corrected in jasper:

Heap-based buffer overflow in the jpc_cox_getcompparms function in
libjasper/jpc/jpc_cs.c in JasPer 1.900.1 allows remote attackers to
execute arbitrary code or cause a denial of service (memory corruption)
via a crafted numrlvls value in a JPEG2000 file (CVE-2011-4516).

The jpc_crg_getparms function in libjasper/jpc/jpc_cs.c in JasPer
1.900.1 uses an incorrect data type during a certain size calculation,
which allows remote attackers to trigger a heap-based buffer overflow
and execute arbitrary code, or cause a denial of service (heap memory
corruption), via a malformed JPEG2000 file (CVE-2011-4517).

The updated packages have been patched to correct these issues.