USN-2982-1: Libksba vulnerabilities
Ubuntu Security Notice USN-2982-1
17th May, 2016
libksba vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Libksba could be made to crash or run programs if it decoded specially crafted data.
Software description
- libksba - X.509 and CMS support library
Details
Hanno Böck discovered that Libksba incorrectly handled decoding certain BER
data. An attacker could use this issue to cause Libksba to crash, resulting
in a denial of service. This issue only applied to Ubunt 12.04 LTS and
Ubuntu 14.04 LTS. (CVE-2016-4353)
Hanno Böck discovered that Libksba incorrectly handled decoding certain BER
data. An attacker could use this issue to cause Libksba to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
applied to Ubunt 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2016-4354,
CVE-2016-4355)
Hanno Böck discovered that Libksba incorrectly handled incorrect utf-8
strings when decoding certain DN data. An attacker could use this issue to
cause Libksba to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only applied to Ubunt 12.04 LTS and
Ubuntu 14.04 LTS. (CVE-2016-4356)
Pascal Cuoq discovered that Libksba incorrectly handled incorrect utf-8
strings when decoding certain DN data. An attacker could use this issue to
cause Libksba to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2016-4574)
Pascal Cuoq discovered that Libksba incorrectly handled decoding certain
data. An attacker could use this issue to cause Libksba to crash, resulting
in a denial of service. (CVE-2016-4579)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 16.04 LTS:
- libksba8 1.3.3-1ubuntu0.16.04.1
- Ubuntu 15.10:
- libksba8 1.3.3-1ubuntu0.15.10.1
- Ubuntu 14.04 LTS:
- libksba8 1.3.0-3ubuntu0.14.04.2
- Ubuntu 12.04 LTS:
- libksba8 1.2.0-2ubuntu0.2
To update your system, please follow these instructions: http://ift.tt/17VXqjU.
In general, a standard system update will make all the necessary changes.
References
CVE-2016-4353, CVE-2016-4354, CVE-2016-4355, CVE-2016-4356, CVE-2016-4574, CVE-2016-4579
from Ubuntu Security Notices http://ift.tt/1sv4C4b