==========================================================================
Ubuntu Security Notice USN-4470-1
August 24, 2020

sane-backends vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in sane-backends.

Software Description:
- sane-backends: None

Details:

Kritphong Mongkhonvanit discovered that sane-backends incorrectly handled
certain packets. A remote attacker could possibly use this issue to obtain
sensitive memory information. This issue only affected Ubuntu 16.04 LTS.
(CVE-2017-6318)

It was discovered that sane-backends incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to execute
arbitrary code. This issue only applied to Ubuntu 18.04 LTS and Ubuntu
20.04 LTS. (CVE-2020-12861)

It was discovered that sane-backends incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to obtain
sensitive information. (CVE-2020-12862, CVE-2020-12863)

It was discovered that sane-backends incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to obtain
sensitive information. This issue only applied to Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-12864)

It was discovered that sane-backends incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to execute
arbitrary code. (CVE-2020-12865)

It was discovered that sane-backends incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to cause a
denial of service. This issue only applied to Ubuntu 18.04 LTS and Ubuntu
20.04 LTS. (CVE-2020-12866)

It was discovered that sane-backends incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2020-12867)

Update instructions:

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

Ubuntu 20.04 LTS:
  libsane1                        1.0.29-0ubuntu5.1

Ubuntu 18.04 LTS:
  libsane1                        1.0.27-1~experimental3ubuntu2.3

Ubuntu 16.04 LTS:
  libsane                         1.0.25+git20150528-1ubuntu2.16.04.3

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

References:
  https://usn.ubuntu.com/4470-1
  CVE-2017-6318, CVE-2020-12861, CVE-2020-12862, CVE-2020-12863,
  CVE-2020-12864, CVE-2020-12865, CVE-2020-12866, CVE-2020-12867

Package Information:
  https://launchpad.net/ubuntu/+source/sane-backends/1.0.29-0ubuntu5.1
  https://launchpad.net/ubuntu/+source/sane-backends/1.0.27-1~experimental3ubuntu2.3

https://launchpad.net/ubuntu/+source/sane-backends/1.0.25+git20150528-1ubuntu2.16.04.3