ArchLinux: 201903-9: libelf: denial of service
Summary
- 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.
Resolution
Upgrade to 0.176-1.
# pacman -Syu "libelf>=0.176-1"
The problems have been fixed upstream in version 0.176.
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/legacy-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
Workaround
None.
