udhcpc6 expects string for bootfile-param opt(60)

Bernd Petrovitsch bernd at petrovitsch.priv.at
Tue Feb 1 20:36:51 UTC 2022


-Hi all!

On 01.02.2022 18:12, Geoff Hanson wrote:
[...]> In most cases, there's no printf directive so this just means it's
> copying the string.

Using some user-provided string as a format-string opens the possibility 
ofexploits - since decades ....
> But this would cause problems in the case where the string did contain %'s.

So why just not only use strncpy(), strlcpy(), memcpy() or similar?

Kind regards,
	Bernd


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