ELF may load debuginfo to get more symbols

[RocketMaDev]

Now the class ELF could load executables perfectly, but some symbols could not be found in libc.so.6 for optimization. However, these debug symbols are included in its debuginfo which could be downloaded via debuginfod on multiple distros. When I try to load the debuginfo so that I have more symbols to access, it failed, as it was detecting relro.

---> 19 libc = ELF('./lib/libc.debuginfo')
File /usr/lib/python3.12/site-packages/pwnlib/elf/elf.py:362, in ELF.__init__(self, path, checksec)
File /usr/lib/python3.12/site-packages/pwnlib/elf/elf.py:457, in ELF._describe(self, *a, **kw)
File /usr/lib/python3.12/site-packages/pwnlib/elf/elf.py:2069, in ELF.checksec(self, banner, color)
File /usr/lib/python3.12/site-packages/pwnlib/elf/elf.py:1702, in ELF.relro(self)
File /usr/lib/python3.12/site-packages/pwnlib/elf/elf.py:1604, in ELF.dynamic_by_tag(self, tag)
AttributeError: 'Section' object has no attribute 'iter_tags'

If the ELF class could pass these checks for debuginfo, more symbols could be grabbed.

[peace-maker]

We should be able to open such ELF files, yes.
In the meantime you can use libcdb.unstrip_libc to grab the debuginfo and merge the debuginfo back into the libc via eu-unstrip. Then you can use all symbols on the original libc.so.6.

[RocketMaDev]

But it just failed to load the debuginfo directly. Do you mean that I can only load it after unstrip_libc?

[peace-maker]

We should fix loading external debuginfo files with the ELF class.