RC4 Stream Cipher Vulnerability in SSH1: Undetectable Message Modification via CRC XOR

CVE-2001-1469 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

The RC4 stream cipher as used by SSH1 allows remote attackers to modify messages without detection by XORing the original message's cyclic redundancy check (CRC) with the CRC of a mask consisting of all the bits of the original message that were modified.

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