CVE-2020-27824

Se encontró un fallo en el codificador de OpenJPEG en la función opj_dwt_calc_explicit_stepsizes(). Este fallo permite a un atacante que puede suministrar una entrada diseñada a niveles de descomposición para causar un desbordamiento del búfer. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema

An update that fixes 8 vulnerabilities is now available. This update for openjpeg2 fixes the following issues. Fixed OOB read in pi_next_lrcp, pi_next_rlcp, pi_next_rpcl, pi_next_pcrl, pi_next_rpcl, and pi_next_cprl in openmj2/pi.c. Fixed heap buffer overflow in color_apply_icc_profile in bin/common/color.c. Fixed heap buffer overflow in lib/openjp2/mqc.c, Fixed OOB read in opj_dwt_calc_explicit_stepsizes. Fixed buffer over-read in lib/openjp2/pi.c. Fixed null pointer dereference in opj_tgt_reset function in lib/openjp2/tgt.c. Fixed OOB read in opj_t2_encode_packet function in openjp2/t2.c. Fixed heap-based buffer over-read in functions opj_pi_next_rlcp, opj_pi_next_rpcl and opj_pi_next_lrcp in openjp2/pi.c.