USN-3297-1: jbig2dec vulnerabilities

Ubuntu Security Notice USN-3297-1

24th May, 2017

jbig2dec vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in jbig2dec.

Software description

  • jbig2dec - JBIG2 decoder library

Details

Bingchang Liu discovered that jbig2dec incorrectly handled memory when
decoding malformed image files. If a user or automated system were tricked
into processing a specially crafted JBIG2 image file, a remote attacker
could cause jbig2dec to crash, resulting in a denial of service, or
possibly execute arbitrary code. This issue only applied to Ubuntu 14.04
LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-9601)

It was discovered that jbig2dec incorrectly handled memory when decoding
malformed image files. If a user or automated system were tricked into
processing a specially crafted JBIG2 image file, a remote attacker could
cause jbig2dec to crash, resulting in a denial of service, or possibly
disclose sensitive information. (CVE-2017-7885)

Jiaqi Peng discovered that jbig2dec incorrectly handled memory when
decoding malformed image files. If a user or automated system were tricked
into processing a specially crafted JBIG2 image file, a remote attacker
could cause jbig2dec to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2017-7975)

Dai Ge discovered that jbig2dec incorrectly handled memory when decoding
malformed image files. If a user or automated system were tricked into
processing a specially crafted JBIG2 image file, a remote attacker could
cause jbig2dec to crash, resulting in a denial of service, or possibly
disclose sensitive information. (CVE-2017-7976)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 17.04:
libjbig2dec0 0.13-4ubuntu0.1
jbig2dec 0.13-4ubuntu0.1
Ubuntu 16.10:
libjbig2dec0 0.13-2ubuntu0.1
jbig2dec 0.13-2ubuntu0.1
Ubuntu 16.04 LTS:
libjbig2dec0 0.12+20150918-1ubuntu0.1
jbig2dec 0.12+20150918-1ubuntu0.1
Ubuntu 14.04 LTS:
libjbig2dec0 0.11+20120125-1ubuntu1.1
jbig2dec 0.11+20120125-1ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2016-9601, CVE-2017-7885, CVE-2017-7975, CVE-2017-7976