CVE-2020-27842

Se presenta un fallo en el codificador t2 de openjpeg en versiones anteriores a 2.4.0. Un atacante que sea capaz de proporcionar una entrada diseñada para ser procesada por openjpeg podría causar una desreferencia del puntero null. El mayor impacto de este fallo es la disponibilidad de la aplicación

A flaw was found in OpenJPEG’s t2 encoder. This flaw allows an attacker who can provide crafted input to be processed by OpenJPEG to cause a NULL pointer dereference issue. The highest threat to this vulnerability is to system availability.

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.