Heap over-read via oversized interleaved section copy
Published Jul 13, 2025 · Updated Jul 14, 2026
Heap-based buffer overflow in GNU Binutils objcopy 2.45 allows local users to read beyond a heap buffer via crafted binary input. In copy_section, the interleave calculation can enlarge the output section size beyond the input-sized allocation, causing the write path to read past the heap buffer. The user must invoke objcopy with crafted input and the --interleave and --byte options; the demonstrated consequence is a process abort.
Summary
What happened
Heap-based buffer overflow in GNU Binutils objcopy 2.45 allows local users to read beyond a heap buffer via crafted binary input. In copy_section, the interleave calculation can enlarge the output section size beyond the input-sized allocation, causing the write path to read past the heap buffer. The user must invoke objcopy with crafted input and the --interleave and --byte options; the demonstrated consequence is a process abort.
The record
- CVE
- CVE-2025-7545
- Published
- Jul 13, 2025
- Updated
- Jul 14, 2026
- Vendor
- Siemens
- Product
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
- Classifications
- CWE-119, CWE-122
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 13, 2025CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=V3.1.5 <*
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Sourceware Bugzilla crafted-input proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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