CVE-2015-8923

La función process_extra en libarchive en versiones anteriores a 3.2.0 utiliza el campo de tamaño y un número con signo en un desplazamiento, lo que permite a atacantes remotos provocar una denegación de servicio (caída) a través de un archivo zip manipulado.

A vulnerability was found in libarchive. A specially crafted ZIP file could cause a few bytes of application memory in a 256-byte region to be disclosed.

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.