The jasmatrixasl function in jasseq.c in JasPer 1.900.27 allows remote attackers to cause a denial of service (invalid memory read and crash) via a crafted image.
The decclnpass function in libjasper/jpc/jpct1dec.c in JasPer 1.900.27 allows remote attackers to cause a denial of service (invalid memory write and crash) or possibly have unspecified other impact via a crafted image.