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Colin Percival's bsdiff 4.3 Memory Corruption

Colin Percival's bsdiff 4.3 Memory Corruption
Posted Jul 10, 2020
Authored by Luis Merino

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival's bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries. Proof of concept included.

tags | exploit, proof of concept
advisories | CVE-2020-14315
SHA-256 | 643f39b2a94fbeb126dfc6e857751a1e90b11ec7a3a02e0368174a11f3c10689
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