[Secure-testing-team] Bug#860787: jbig2dec: CVE-2017-7976: Integer overflow in function jbig2_image_compose

[Salvatore Bonaccorso]

Source: jbig2dec
Version: 0.13-4
Severity: important
Tags: security upstream
Forwarded: https://bugs.ghostscript.com/show_bug.cgi?id=697683
Control: found -1 0.13-4~deb8u1

Hi,

the following vulnerability was published for jbig2dec.

CVE-2017-7976[0]:
| Artifex jbig2dec 0.13 allows out-of-bounds writes and reads because of
| an integer overflow in the jbig2_image_compose function in
| jbig2_image.c during operations on a crafted .jb2 file, leading to a
| denial of service (application crash) or disclosure of sensitive
| information from process memory.

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-2017-7976
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7976
[1] https://bugs.ghostscript.com/show_bug.cgi?id=697683

Regards,
Salvatore