Arch Linux Security Advisory ASA-201903-9 ========================================= Severity: Medium Date : 2019-03-18 CVE-ID : CVE-2019-7148 CVE-2019-7149 CVE-2019-7150 CVE-2019-7664 CVE-2019-7665 Package : libelf Type : denial of service Remote : Yes Link : https://security.archlinux.org/AVG-863 Summary ======= The package libelf before version 0.176-1 is vulnerable to denial of service. Resolution ========== Upgrade to 0.176-1. # pacman -Syu "libelf>=0.176-1" The problems have been fixed upstream in version 0.176. Workaround ========== None. Description =========== - CVE-2019-7148 (denial of service) An attempted excessive memory allocation was discovered in the function read_long_names in elf_begin.c in libelf in elfutils <= 0.175. Remote attackers could leverage this vulnerability to cause a denial-of- service via crafted elf input, which leads to an out-of-memory exception. - CVE-2019-7149 (denial of service) A heap-based buffer over-read was discovered in the function read_srclines in dwarf_getsrclines.c in libdw in elfutils 0.175. A crafted input can cause segmentation faults, leading to denial-of- service. - CVE-2019-7150 (denial of service) An issue was discovered in elfutils 0.175. A segmentation fault can occur in the function elf64_xlatetom in libelf/elf32_xlatetom.c, due to dwfl_segment_report_module not checking whether the dyn data read from a core file is truncated. A crafted input can cause a program crash, leading to denial-of-service. - CVE-2019-7664 (denial of service) In elfutils 0.175, a negative-sized memcpy is attempted in elf_cvt_note in libelf/note_xlate.h because of an incorrect overflow check. Crafted elf input causes a segmentation fault, leading to denial of service (program crash). - CVE-2019-7665 (denial of service) In elfutils 0.175, a heap-based buffer over-read was discovered in the function elf32_xlatetom in elf32_xlatetom.c in libelf. A crafted ELF input can cause a segmentation fault leading to denial of service (program crash) because ebl_core_note does not reject malformed core file notes. Impact ====== A remote attacker is able to crash a program that uses libelf by providing it with a crafted ELF file. References ========== https://sourceware.org/bugzilla/show_bug.cgi?id=24085 https://sourceware.org/bugzilla/show_bug.cgi?id=24102 https://sourceware.org/bugzilla/show_bug.cgi?id=24103 https://sourceware.org/bugzilla/show_bug.cgi?id=24084 https://sourceware.org/ml/elfutils-devel/2019-q1/msg00049.html https://sourceware.org/bugzilla/show_bug.cgi?id=24089 https://security.archlinux.org/CVE-2019-7148 https://security.archlinux.org/CVE-2019-7149 https://security.archlinux.org/CVE-2019-7150 https://security.archlinux.org/CVE-2019-7664 https://security.archlinux.org/CVE-2019-7665