CVE-2019-7148

An attempted excessive memory allocation was discovered in the function read_long_names in elf_begin.c in libelf in elfutils 0.174. Remote attackers could leverage this vulnerability to cause a denial-of-service via crafted elf input, which leads to an out-of-memory exception. NOTE: The maintainers believe this is not a real issue, but instead a "warning caused by ASAN because the allocation is big. By setting ASAN_OPTIONS=allocator_may_return_null=1 and running the reproducer, nothing happens."

An attempted excessive memory allocation was discovered in the function read_long_names in elf_begin.c in libelf in elfutils 0.174. Remote attackers could leverage this vulnerability to cause a denial-of-service via crafted elf input, which leads to an out-of-memory exception. NOTE: The maintainers believe this is not a real issue, but instead a "warning caused by ASAN because the allocation is big. By setting ASAN_OPTIONS=allocator_may_return_null=1 and running the reproducer, nothing happens."

An attempted excessive memory allocation was discovered in the function read_long_names in elf_begin.c in libelf in elfutils 0.174. Remote attackers could leverage this vulnerability to cause a denial-of-service via crafted elf input, which leads to an out-of-memory exception. NOTE: The maintainers believe this is not a real issue, but instead a "warning caused by ASAN because the allocation is big. By setting ASAN_OPTIONS=allocator_may_return_null=1 and running the reproducer, nothing happens."

This update for dwarves and elfutils fixes the following issues:

elfutils was updated to version 0.177 (jsc#SLE-24501):

• elfclassify: New tool to analyze ELF objects.
• readelf: Print DW_AT_data_member_location as decimal offset. Decode DW_AT_discr_list block attributes.
• libdw: Add DW_AT_GNU_numerator, DW_AT_GNU_denominator and DW_AT_GNU_bias.
• libdwelf: Add dwelf_elf_e_machine_string. dwelf_elf_begin now only returns NULL when there is an error reading or decompressing a file. If the file is not an ELF file an ELF handle of type ELF_K_NONE is returned.
• backends: Add support for C-SKY.

Update to version 0.176:

• build: Add new --enable-install-elfh option. Do NOT use this for system installs (it overrides glibc elf.h).
• backends: riscv improved core file and return value location support.
• Fixes:
  • CVE-2019-7146, CVE-2019-7148, CVE-2019-7149, CVE-2019-7664 - CVE-2019-7150: dwfl_segment_report_module doesn't check whether the dyn data read from core file is truncated (bsc#1123685)
  • CVE-2019-7665: NT_PLATFORM core file note should be a zero terminated string (CVE is a bit misleading, as this is not a bug in libelf as described) (bsc#1125007)

Update to version 0.175:

• readelf: Handle mutliple .debug_macro sections. Recognize and parse GNU Property, NT_VERSION and GNU Build Attribute ELF Notes.
• strip: Handle SHT_GROUP correctly. Add strip --reloc-debug-sections-only option. Handle relocations against GNU compressed sections.
• libdwelf: New function dwelf_elf_begin.
• libcpu: Recognize bpf jump variants BPF_JLT, BPF_JLE, BPF_JSLT and BPF_JSLE. backends: RISCV handles ADD/SUB relocations. Handle SHT_X86_64_UNWIND.
  • CVE-2018-18521: arlib: Divide-by-zero vulnerabilities in the function arlib_add_symbols() used by eu-ranlib (bsc#1112723)
  • CVE-2018-18310: Invalid Address Read problem in dwfl_segment_report_module.c (bsc#1111973)
  • CVE-2018-18520: eu-size: Bad handling of ar files inside are files (bsc#1112726)

Update to version 0.174:

• libelf, libdw and all tools now handle extended shnum and shstrndx correctly.

• elfcompress: Don't rewrite input file if no section data needs updating. Try harder to keep same file mode bits (suid) on rewrite.

• strip: Handle mixed (out of order) allocated/non-allocated sections.

• unstrip: Handle SHT_GROUP sections.

• backends: RISCV and M68K now have backend implementations to generate CFI based backtraces.

• Fixes:

  • CVE-2018-16402: libelf: denial of service/double free on an attempt to decompress the same section twice (bsc#1107066) Double-free crash in nm and readelf
  • CVE-2018-16403: heap buffer overflow in readelf (bsc#1107067)
  • CVE-2018-16062: heap-buffer-overflow in /elfutils/libdw/dwarf_getaranges.c:156 (bsc#1106390)

Update to version 0.173:

• More fixes for crashes and hangs found by afl-fuzz. In particular various functions now detect and break infinite loops caused by bad DIE tree cycles.
• readelf: Will now lookup the size and signedness of constant value types to display them correctly (and not just how they were encoded).
• libdw: New function dwarf_next_lines to read CU-less .debug_line data. dwarf_begin_elf now accepts ELF files containing just .debug_line or .debug_frame sections (which can be read without needing a DIE tree from the .debug_info section). Removed dwarf_getscn_info, which was never implemented.
• backends: Handle BPF simple relocations. The RISCV backends now handles ABI specific CFI and knows about RISCV register types and names.

Update to version 0.172:

• Various bug fixes in libdw and eu-readelf dealing with bad DWARF5 data. Thanks to running the afl fuzzer on eu-readelf and various testcases.

Update to version 0.171:

• DWARF5 and split dwarf,…

This update for dwarves and elfutils fixes the following issues:

elfutils was updated to version 0.177 (jsc#SLE-24501):

• elfclassify: New tool to analyze ELF objects.
• readelf: Print DW_AT_data_member_location as decimal offset. Decode DW_AT_discr_list block attributes.
• libdw: Add DW_AT_GNU_numerator, DW_AT_GNU_denominator and DW_AT_GNU_bias.
• libdwelf: Add dwelf_elf_e_machine_string. dwelf_elf_begin now only returns NULL when there is an error reading or decompressing a file. If the file is not an ELF file an ELF handle of type ELF_K_NONE is returned.
• backends: Add support for C-SKY.

Update to version 0.176:

• build: Add new --enable-install-elfh option. Do NOT use this for system installs (it overrides glibc elf.h).
• backends: riscv improved core file and return value location support.
• Fixes:
  • CVE-2019-7146, CVE-2019-7148, CVE-2019-7149, CVE-2019-7664 - CVE-2019-7150: dwfl_segment_report_module doesn't check whether the dyn data read from core file is truncated (bsc#1123685)
  • CVE-2019-7665: NT_PLATFORM core file note should be a zero terminated string (CVE is a bit misleading, as this is not a bug in libelf as described) (bsc#1125007)

Update to version 0.175:

• readelf: Handle mutliple .debug_macro sections. Recognize and parse GNU Property, NT_VERSION and GNU Build Attribute ELF Notes.
• strip: Handle SHT_GROUP correctly. Add strip --reloc-debug-sections-only option. Handle relocations against GNU compressed sections.
• libdwelf: New function dwelf_elf_begin.
• libcpu: Recognize bpf jump variants BPF_JLT, BPF_JLE, BPF_JSLT and BPF_JSLE. backends: RISCV handles ADD/SUB relocations. Handle SHT_X86_64_UNWIND.
  • CVE-2018-18521: arlib: Divide-by-zero vulnerabilities in the function arlib_add_symbols() used by eu-ranlib (bsc#1112723)
  • CVE-2018-18310: Invalid Address Read problem in dwfl_segment_report_module.c (bsc#1111973)
  • CVE-2018-18520: eu-size: Bad handling of ar files inside are files (bsc#1112726)

Update to version 0.174:

• libelf, libdw and all tools now handle extended shnum and shstrndx correctly.

• elfcompress: Don't rewrite input file if no section data needs updating. Try harder to keep same file mode bits (suid) on rewrite.

• strip: Handle mixed (out of order) allocated/non-allocated sections.

• unstrip: Handle SHT_GROUP sections.

• backends: RISCV and M68K now have backend implementations to generate CFI based backtraces.

• Fixes:

  • CVE-2018-16402: libelf: denial of service/double free on an attempt to decompress the same section twice (bsc#1107066) Double-free crash in nm and readelf
  • CVE-2018-16403: heap buffer overflow in readelf (bsc#1107067)
  • CVE-2018-16062: heap-buffer-overflow in /elfutils/libdw/dwarf_getaranges.c:156 (bsc#1106390)

Update to version 0.173:

• More fixes for crashes and hangs found by afl-fuzz. In particular various functions now detect and break infinite loops caused by bad DIE tree cycles.
• readelf: Will now lookup the size and signedness of constant value types to display them correctly (and not just how they were encoded).
• libdw: New function dwarf_next_lines to read CU-less .debug_line data. dwarf_begin_elf now accepts ELF files containing just .debug_line or .debug_frame sections (which can be read without needing a DIE tree from the .debug_info section). Removed dwarf_getscn_info, which was never implemented.
• backends: Handle BPF simple relocations. The RISCV backends now handles ABI specific CFI and knows about RISCV register types and names.

Update to version 0.172:

• Various bug fixes in libdw and eu-readelf dealing with bad DWARF5 data. Thanks to running the afl fuzzer on eu-readelf and various testcases.

Update to version 0.171:

• DWARF5 and split dwarf,…