fix: update apport coredump path handling for CorefileFinder (#2518)

* fix: update apport coredump path handling for CorefileFinder

* chore: update comment on Apport core path handling

* Update CHANGELOG

---------

Co-authored-by: Peace-Maker <[email protected]>

Author: Meetesh-Saini

CHANGELOG.md

@@ -115,8 +115,10 @@ The table below shows which release corresponds to each branch, and what date th
 ## 4.14.1
 
 - [#2533][2533] Fix installation on Python 3.5 and lower
+- [#2518][2518] fix: update apport coredump path handling for CorefileFinder
 
 [2533]: https://github.com/Gallopsled/pwntools/pull/2533
+[2518]: https://github.com/Gallopsled/pwntools/pull/2518
 
 ## 4.14.0 (`stable`)
 

pwnlib/elf/corefile.py

@@ -1510,7 +1510,18 @@ def apport_coredump(self):
         # should be unique enough that we can just glob.
 
         boot_id = read('/proc/sys/kernel/random/boot_id').strip().decode()
-        path = self.exe.replace('/', '_')
+
+        # Use the absolute path of the executable
+        # Apport uses the executable's path to determine the core dump filename
+        #
+        # Reference source:
+        # https://github.com/canonical/apport/blob/4bbb179b8f92989bf7c1ee3692074f35d70ef3e8/data/apport#L110
+        # https://github.com/canonical/apport/blob/4bbb179b8f92989bf7c1ee3692074f35d70ef3e8/apport/fileutils.py#L599
+        #
+        # Apport calls `get_core_path` with `options.executable_path`, which corresponds to
+        # the executable's pathname, as specified by the `%E` placeholder
+        # in the core pattern (see `man core` and `apport --help`).
+        path = os.path.abspath(self.exe).replace('/', '_').replace('.', '_')
 
         # Format the name
         corefile_name = 'core.{path}.{uid}.{boot_id}.{pid}.*'.format(