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Ubuntu Security Notice USN-3813-1

Ubuntu Security Notice USN-3813-1
Posted Nov 8, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3813-1 - It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. It was discovered that pyOpenSSL incorrectly handled memory when performing operations on a PKCS #12 store. A remote attacker could possibly use this issue to cause pyOpenSSL to consume resources, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2018-1000807, CVE-2018-1000808
MD5 | 17ee1c5903a74363c12d44b59d9fe872

Ubuntu Security Notice USN-3813-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3813-1
November 08, 2018

pyopenssl vulnerabilities
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in pyOpenSSL.

Software Description:
- pyopenssl: Python wrapper around the OpenSSL library

Details:

It was discovered that pyOpenSSL incorrectly handled memory when handling
X509 objects. A remote attacker could use this issue to cause pyOpenSSL to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2018-1000807)

It was discovered that pyOpenSSL incorrectly handled memory when performing
operations on a PKCS #12 store. A remote attacker could possibly use this
issue to cause pyOpenSSL to consume resources, resulting in a denial of
service. (CVE-2018-1000808)

Update instructions:

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

Ubuntu 16.04 LTS:
python-openssl 0.15.1-2ubuntu0.2
python3-openssl 0.15.1-2ubuntu0.2

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

References:
https://usn.ubuntu.com/usn/usn-3813-1
CVE-2018-1000807, CVE-2018-1000808

Package Information:
https://launchpad.net/ubuntu/+source/pyopenssl/0.15.1-2ubuntu0.2
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