Jan 24 13:15:32 INFO Downgraded: libtiff-4.0.6-2.fc24.x86_64
Jan 24 13:15:32 INFO Downgraded: libtiff-tools-4.0.6-2.fc24.x86_64
Jan 24 13:15:32 INFO Erased: libtiff-tools-4.0.7-1.fc24.x86_64
Jan 24 13:15:32 INFO Erased: libtiff-4.0.7-1.fc24.x86_64

while the update was installed last december i did notice the regression that late because a few days ago an important fax was received for whatever reason without issues but others are not

testing with a friend (because testing fax is really not that easy as any other software) showed after downgrade the first try was successful

https://sourceforge.net/p/hylafax/mailman/message/35552822/
__________________________________

Re: [hylafax-users] HYLAFAX no longer works after LIBTIFF update
From: Chris Severance <aur.severach@sp...> - 2016-12-15 10:07:02

++/* WARNING: do not change the layout of this structure as the Halyfax
software */
++/* really depends on it. See
http://bugzilla.maptools.org/show_bug.cgi?id=2636 */
+ typedef struct {                /* state table entry */
+       unsigned char State;    /* see above */
+       unsigned char Width;    /* width of code in bits */
+-      uint16 Param;           /* unsigned 16-bit run length in bits */
++      uint32 Param;           /* unsigned 32-bit run length in bits
(holds on 16 bit actually, but cannot be changed. See above warning) */
+ } TIFFFaxTabEnt;

The changing the variable from 32 to 16 bits gets expanded back out by
structure padding. The position of the bits change but the structure
size doesn't. The size won't reduce on >= 32 bit systems. You'd need to
compile in a 16 bit OS to see a structure size change. 

The patch has Hylafax misspelled.
__________________________________

[hylafax-users] HYLAFAX no longer works after LIBTIFF update
From: <m.weissbach@in...> - 2016-12-06 15:04:10

Dear members,

I have a big problem with the Hylafax+ server. After updating libtiff to
"libtiff 4.0.7-1", the fax server is unusable, because sending and
receiving break with errors.
The only solution to continue to use Hylafax+ for me is a downgrade to
"libtiff 4.0.6-2". After the downgrade everything works fine.
But with regard to the security problem encountered at libtiff, the use
of the old version is, of course, a bit of a concern.

I ask for support because 30 stations hang at the fax server. Therefore
this is really needed for me.
__________________________________