The _bfd_XX_bfd_copy_private_bfd_data_common function in peXXigen.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.30, processes a negative Data Directory size with an unbounded loop that increases the value of (external_IMAGE_DEBUG_DIRECTORY) *edd so that the address exceeds its own memory region, resulting in an out-of-bounds memory write, as demonstrated by objcopy copying private info with _bfd_pex64_bfd_copy_private_bfd_data_common in pex64igen.c.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||5.5||Base Metrics:||AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H|
|Access Vector:||Local network||Attack Complexity:||Low|
|Privileges Required:||Low||User Interaction:||None|
|Integrity Impact:||None||Availability Impact:||High|
|Oracle Linux version 7 (binutils)||ELSA-2018-3032||2018-11-05|
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