Sudden trouble with net/rdesktop

[Yuri Pankov]

Andrea Venturoli wrote:
> Hello.
> 
> After many year of happy usage, since yesterday rdesktop dumps core 
> (12.2/amd64).
> 
>> % rdesktop xxxxxx
>> Assertion failed: ((len * 2) < size), function _utils_data_to_hex, 
>> file utils.c, line 499.
>> Abort (core dumped)
> 
> This is systematic with 4 servers out of 5; the 5th still works 
> perfectly, but I have no idea in which way it might differ from the others.
> 
> I don't think this has anything to do with the upgrade to 1.9.0, since I 
> was able to use 1.9.0 for a while.
> 
> Anyone else seeing this?
> Where do I go and look?

I see a similar report on github:

https://github.com/rdesktop/rdesktop/issues/380

Could it be something that changed on remote side, e.g. any recent updates?

As a workaround, try increasing the buf size to e.g. 512 in 
utils.c:_utils_cert_get_info().