Arch Linux Security Advisory ASA-201606-23
=========================================
Severity: High
Date    : 2016-06-25
CVE-ID  : CVE-2016-5027 CVE-2016-5028 CVE-2016-5029 CVE-2016-5030
          CVE-2016-5031 CVE-2016-5032 CVE-2016-5033 CVE-2016-5034
          CVE-2016-5035 CVE-2016-5036 CVE-2016-5037 CVE-2016-5038
          CVE-2016-5039 CVE-2016-5040 CVE-2016-5041 CVE-2016-5042
          CVE-2016-5043 CVE-2016-5044
Package : libdwarf
Type    : arbitrary code execution
Remote  : No
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package libdwarf before version 20160613-1 is vulnerable to
arbitrary code execution.

Resolution
=========
Upgrade to 20160613-1.

# pacman -Syu "libdwarf>=20160613-1"

The problems have been fixed upstream in version 20160613.

Workaround
=========
None.

Description
==========
- CVE-2016-5027 (denial of service)

Multiple NULL pointer dereference issues in several functions of
libdwarf/dwarf_leb.c, where leb128_length was wrongly assumed non-NULL.

- CVE-2016-5028 (denial of service)

NULL pointer dereference issue in print_frame_inst_bytes().

- CVE-2016-5029 (denial of service)

NULL pointer dereference issue in create_fullest_file_path().

- CVE-2016-5030 (denial of service)

NULL pointer dereference issue in _dwarf_calculate_info_section_end_ptr().

- CVE-2016-5031 (denial of service)

Out-of-bounds read bug in print_frame_inst_bytes().

- CVE-2016-5032 (denial of service)

Out-of-bounds read bug in dwarf_get_xu_hash_entry().

- CVE-2016-5033 (denial of service)

Out-of-bounds read bug in print_exprloc_content().

- CVE-2016-5034 (arbitrary code execution)

Invalid write in dwarf_elf_access.c.

- CVE-2016-5035 (denial of service)

Out-of-bounds read bug in _dwarf_read_line_table_header().

- CVE-2016-5036 (denial of service)

Out-of-bounds read bug in dump_block().

- CVE-2016-5037 (denial of service)

NULL pointer dereference issue in _dwarf_load_section().

- CVE-2016-5038 (denial of service)

NULL pointer dereference issue in dwarf_get_macro_startend_file().

- CVE-2016-5039 (denial of service)

Out-of-bounds read bug in get_attr_value().

- CVE-2016-5040 (denial of service)

Out-of-bounds read bug.

- CVE-2016-5041 (denial of service)

NULL pointer dereference issue.

- CVE-2016-5042 (denial of service)

Infinite loop leading to out-of-bounds read in dwarf_get_aranges_list().

- CVE-2016-5043 (denial of service)

Out-of-bounds read bug in dwarf_dealloc().

- CVE-2016-5044 (arbitrary code execution)

Heap-overflow.


Impact
=====
An attacker might be able to execute arbitrary code on the affected host
with a crafted ELF file, or crafted dwarf sections in a object file.

References
=========
https://seclists.org/oss-sec/2016/q2/393
https://www.prevanders.net/dwarfbug.html
https://access.redhat.com/security/cve/CVE-2016-5027
https://access.redhat.com/security/cve/CVE-2016-5028
https://access.redhat.com/security/cve/CVE-2016-5029
https://access.redhat.com/security/cve/CVE-2016-5030
https://access.redhat.com/security/cve/CVE-2016-5031
https://access.redhat.com/security/cve/CVE-2016-5032
https://access.redhat.com/security/cve/CVE-2016-5033
https://access.redhat.com/security/cve/CVE-2016-5034
https://access.redhat.com/security/cve/CVE-2016-5035
https://access.redhat.com/security/cve/CVE-2016-5036
https://access.redhat.com/security/cve/CVE-2016-5037
https://access.redhat.com/security/cve/CVE-2016-5038
https://access.redhat.com/security/cve/CVE-2016-5039
https://access.redhat.com/security/cve/CVE-2016-5040
https://access.redhat.com/security/cve/CVE-2016-5041
https://access.redhat.com/security/cve/CVE-2016-5042
https://access.redhat.com/security/cve/CVE-2016-5043
https://access.redhat.com/security/cve/CVE-2016-5044