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A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of attacker-controlled checksum lengths (s2length) in the code. When MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes), an attacker can write out of bounds in the sum2 buffer.

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Mr Loi Liang Yang is a Certified Information Systems Security Professional (CISSP), Certified Ethical Hacker and CompTIA Security+ cybersecurity consultant. Loi advises large enterprises including multiple fortune 500 companies on security strategy to protect against advanced threats.

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