CVE-2016-4300

Desbordamiento de entero en la función read_SubStreamsInfo en archive_read_support_format_7zip.c en libarchive en versiones anteriores a 3.2.1 permite a atacantes remotos ejecutar código arbitrario a través de un archivo 7zip con un gran número de subcorrientes, lo que desencadena un desbordamiento de búfer basado en memoria dinámica.

A vulnerability was found in libarchive's handling of 7zip data. A specially crafted 7zip file can cause a integer overflow resulting in memory corruption that can lead to code execution.

An update that fixes 20 vulnerabilities is now available. Libarchive was updated to fix 20 security issues. These security issues were fixed. Overlapping memcpy in CAB parser. Heap out of bounds read in LHA/LZH parser. Stack out of bounds read in ar parser. Global out of bounds read in mtree parser. Null pointer access in 7z parser. Unclear crashes in ZIP parser. Heap buffer read overflow in tar. Unclear invalid memory read in mtree parser. NULL pointer access in RAR parser. Heap out of bounds read in mtree parser. Memory leak in tar parser. Endless loop in ISO parser. Undefined behavior / signed integer overflow in mtree parser. Compress handler left shifting larger than int size. Undefined behavior / signed integer overflow in TAR parser. Out of bounds read in RAR. Heap buffer overflow vulnerability in the 7zip read_SubStreamsInfo. Stack buffer overflow in the mtree parse_device. Heap buffer overflow in the Rar decompression functionality. Memory allocate error with symbolic links in cpio archives. This update was imported from the SUSE:SLE-12:Update update project.