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Lennard Hofmann 67797191e0 patch 9.1.0404: [security] xxd: buffer-overflow with specific flags
Problem:  [security] xxd: buffer-overflow with specific flags
Solution: Correctly calculate the required buffer space
          (Lennard Hofmann)

xxd writes each output line into a global buffer before printing.
The maximum size of that buffer was not calculated correctly.

This command was crashing in AddressSanitizer:
$ xxd -Ralways -g1 -c256 -d -o 9223372036854775808 /etc/passwd

This prints a line of 6680 bytes but the buffer only had room for 6549 bytes.
If the output from "-b" was colored, the line could be even longer.

closes: #14738

Co-authored-by: K.Takata <kentkt@csc.jp>
Signed-off-by: Lennard Hofmann <lennard.hofmann@web.de>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2024-05-10 14:41:18 +02:00
..
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