Ubuntu Security Notice 1436-1 - Matthew Hall discovered that Libtasn1 incorrectly handled certain large values. An attacker could exploit this with a specially crafted ASN.1 structure and cause a denial of service, or possibly execute arbitrary code.
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Ubuntu Security Notice USN-1436-1
May 02, 2012
libtasn1-3 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
Libtasn1 could be made to crash or run programs as your login if it
received specially crafted input.
Software Description:
- libtasn1-3: Library to manage ASN.1 structures
Details:
Matthew Hall discovered that Libtasn1 incorrectly handled certain large
values. An attacker could exploit this with a specially crafted ASN.1
structure and cause a denial of service, or possibly execute arbitrary
code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
libtasn1-3 2.10-1ubuntu1.1
Ubuntu 11.10:
libtasn1-3 2.9-4ubuntu0.1
Ubuntu 11.04:
libtasn1-3 2.7-1ubuntu1.1
Ubuntu 10.04 LTS:
libtasn1-3 2.4-1ubuntu0.1
Ubuntu 8.04 LTS:
libtasn1-3 1.1-1ubuntu0.1
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1436-1
CVE-2012-1569
Package Information:
https://launchpad.net/ubuntu/+source/libtasn1-3/2.10-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libtasn1-3/2.9-4ubuntu0.1
https://launchpad.net/ubuntu/+source/libtasn1-3/2.7-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libtasn1-3/2.4-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libtasn1-3/1.1-1ubuntu0.1