Bug 1567797
| Summary: | root permission needed to read globally readable file | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | jiri vanek <jvanek> |
| Component: | libdasm | Assignee: | Michal Ambroz <rebus> |
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | rawhide | CC: | rebus |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-04-17 18:11:54 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
It is a bug, fopen is called with parameter "r+b" (read and write, binary) instead of "rb" (read binary). Created pull request upstream to fix this: https://github.com/jtpereyda/libdasm/pull/9 Patched also the fedora package in rawhide for next release. I won't be pushing the update packages now as this is not core or even purpose of libdasm or "das" example application to disassemble whole libraries. The libdasm / das is meant to be used for 32-bit opcode such as snippets of the shellcode / functions etc. Sure. Thanx! |
Hello! Maybe it is feature, not a bug, but to disassemble system libraries, one needs to be root, even if the file is globally readable and executable: $ ls -l /bin/das /usr/lib/libasound.so.2.0.0 -rwxr-xr-x 1 root root 11328 Apr 3 21:30 /bin/das -rwxr-xr-x 1 root root 1093988 Nov 14 10:03 /usr/lib/libasound.so.2.0.0 ˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇˇ $ /bin/das /usr/lib/libasound.so.2.0.0 | head Error: unable to open file "/usr/lib/libasound.so.2.0.0" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ $ cat /bin/das /usr/lib/libasound.so.2.0.0 | head ELF>� @@@%@8 @@@@@@ $ sudo /bin/das /usr/lib/libasound.so.2.0.0 | head 00000000 7f45 jg 0x47 00000002 4c dec esp 00000003 46 inc esi 00000004 0101 add [ecx],eax 00000006 0100 add [eax],eax 00000008 0000 add [eax],al 0000000a 0000 add [eax],al 0000000c 0000 add [eax],al 0000000e 0000 add [eax],al 00000010 0300 add eax,[eax]