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Overlapping relocations in MACH-O creating incorrect symbols #6387

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emesare opened this issue Feb 3, 2025 · 0 comments
Open

Overlapping relocations in MACH-O creating incorrect symbols #6387

emesare opened this issue Feb 3, 2025 · 0 comments
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Component: Relocations Effort: Low Issue should take < 1 week File Format: Mach-O State: Awaiting Triage Issue is waiting for more in-depth triage from a developer

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@emesare
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emesare commented Feb 3, 2025

Version and Platform (required):

  • Binary Ninja Version: 4.3.6732-dev

Bug Description:
Overlapping relocations (see picture) are seemingly breaking all extern entries after CFStringGetMaximumSizeForEncoding.

Steps To Reproduce:
Please provide all steps required to reproduce the behavior:

  1. Open provided binary (V35: glow flare chest)
  2. Go to .extern section
  3. Observe clearly wrong symbols

Expected Behavior:
The relocations should be pointing at the correct .extern entry!

Screenshots/Video Recording:
extern section is all screwed up after CFStringGetMaximumSizeForEncoding:
Image

Relocation info showing multiple overlapping relocations:
Image

Binary:
Binary available with glow flare chest
@emesare emesare added Component: Relocations File Format: Mach-O Impact: Medium Issue is impactful with a bad, or no, workaround State: Awaiting Triage Issue is waiting for more in-depth triage from a developer labels Feb 3, 2025
@plafosse plafosse added Effort: Low Issue should take < 1 week and removed Impact: Medium Issue is impactful with a bad, or no, workaround labels Feb 11, 2025
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Component: Relocations Effort: Low Issue should take < 1 week File Format: Mach-O State: Awaiting Triage Issue is waiting for more in-depth triage from a developer
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@plafosse @emesare