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The mac_compute() function in openssh calls umac_final() to prepend a tag to a buffer. Umac_final() calls pdf_gen_xor() on the tag as its final operation, and as implemented, pdf_gen_xor() assumes an appropriate alignment for 64-bit operations on its buffer. However, the buffer is declared in mac_compute() as a static u_char array, and the linker doesn't guarantee 64-bit alignment for such

Hi All. OpenSSH 4.7 is preparing for release so we are asking for any interested folks to please test a snapshot. The main changes are: * sshd(8) in new installations defaults to SSH Protocol 2 only. Existing installations are unchanged. * The SSH channel window size has been increased, which improves performance on high-BDP networks. * ssh(1) and sshd(8) now preserve MAC