Ubuntu Security Notice 1540-2 - USN-1540-1 fixed vulnerabilities in NSS. This update provides the corresponding updates for Ubuntu 12.04 LTS. Kaspar Brand discovered a vulnerability in how the Network Security Services (NSS) ASN.1 decoder handles zero length items. If the user were tricked into opening a specially crafted certificate, an attacker could possibly exploit this to cause a denial of service via application crash. Various other issues were also addressed.
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Ubuntu Security Notice USN-1540-2
August 21, 2012
nss vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
Summary:
NSS could be made to crash if it opened a specially crafted certificate.
Software Description:
- nss: Network Security Service library
Details:
USN-1540-1 fixed vulnerabilities in NSS. This update provides the
corresponding updates for Ubuntu 12.04 LTS.
Original advisory details:
Kaspar Brand discovered a vulnerability in how the Network Security
Services (NSS) ASN.1 decoder handles zero length items. If the user were
tricked into opening a specially crafted certificate, an attacker could
possibly exploit this to cause a denial of service via application crash.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
libnss3 3.13.1.with.ckbi.1.88-1ubuntu6.1
After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1540-2
http://www.ubuntu.com/usn/usn-1540-1
CVE-2012-0441
Package Information:
https://launchpad.net/ubuntu/+source/nss/3.13.1.with.ckbi.1.88-1ubuntu6.1