Exploit/Advisories

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Ubuntu Security Notice USN-4339-1
April 27, 2020

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

- Ubuntu 20.04
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in OpenEXR.

Software Description:
- openexr: tools for the OpenEXR image format

Details:

Brandon Perry discovered that OpenEXR incorrectly handled certain malformed
EXR image files. If a user were tricked into opening a crafted EXR image
file, a remote attacker could cause a denial of service, or possibly
execute arbitrary code. This issue only applied to Ubuntu 20.04 LTS.
(CVE-2017-9111, CVE-2017-9113, CVE-2017-9115)

Tan Jie discovered that OpenEXR incorrectly handled certain malformed EXR
image files. If a user were tricked into opening a crafted EXR image file,
a remote attacker could cause a denial of service, or possibly execute
arbitrary code. This issue only applied to Ubuntu 20.04 LTS.
(CVE-2018-18444)

Samuel Groß discovered that OpenEXR incorrectly handled certain malformed
EXR image files. If a user were tricked into opening a crafted EXR image
file, a remote attacker could cause a denial of service, or possibly
execute arbitrary code. (CVE-2020-11758, CVE-2020-11759, CVE-2020-11760,
CVE-2020-11761, CVE-2020-11762, CVE-2020-11763, CVE-2020-11764)

It was discovered that OpenEXR incorrectly handled certain malformed EXR
image files. If a user were tricked into opening a crafted EXR image
file, a remote attacker could cause a denial of service. (CVE-2020-11765)

Update instructions:

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

Ubuntu 20.04:
libopenexr24 2.3.0-6ubuntu0.1
openexr 2.3.0-6ubuntu0.1

Ubuntu 19.10:
libopenexr23 2.2.1-4.1ubuntu1.1
openexr 2.2.1-4.1ubuntu1.1

Ubuntu 18.04 LTS:
libopenexr22 2.2.0-11.1ubuntu1.2
openexr 2.2.0-11.1ubuntu1.2

Ubuntu 16.04 LTS:
libopenexr22 2.2.0-10ubuntu2.2
openexr 2.2.0-10ubuntu2.2

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

References:
https://usn.ubuntu.com/4339-1
CVE-2017-9111, CVE-2017-9113, CVE-2017-9115, CVE-2018-18444,
CVE-2020-11758, CVE-2020-11759, CVE-2020-11760, CVE-2020-11761,
CVE-2020-11762, CVE-2020-11763, CVE-2020-11764, CVE-2020-11765

Package Information:
https://launchpad.net/ubuntu/+source/openexr/2.3.0-6ubuntu0.1
https://launchpad.net/ubuntu/+source/openexr/2.2.1-4.1ubuntu1.1
https://launchpad.net/ubuntu/+source/openexr/2.2.0-11.1ubuntu1.2
https://launchpad.net/ubuntu/+source/openexr/2.2.0-10ubuntu2.2

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