[Secure-testing-team] Bug#891288: tiff: CVE-2018-7456: null pointer dereference

[Salvatore Bonaccorso]

Source: tiff
Version: 4.0.9-3
Severity: important
Tags: security upstream
Forwarded: http://bugzilla.maptools.org/show_bug.cgi?id=2778

Hi,

the following vulnerability was published for tiff.

CVE-2018-7456[0]:
| A NULL Pointer Dereference occurs in the function TIFFPrintDirectory in
| tif_print.c in LibTIFF 4.0.9 when using the tiffinfo tool to print
| crafted TIFF information, a different vulnerability than
| CVE-2017-18013. (This affects an earlier part of the TIFFPrintDirectory
| function that was not addressed by the CVE-2017-18013 patch.)

Note that this is a different issue than CVE-2017-18013. Attached is
the poc from the reporter.

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2018-7456
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7456
[1] http://bugzilla.maptools.org/show_bug.cgi?id=2778

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore