CVE-2014-3468

Updated libtasn1 packages fix security vulnerabilities:

Multiple buffer boundary check issues were discovered in libtasn1 library, causing it to read beyond the boundary of an allocated buffer. An untrusted ASN.1 input could cause an application using the library to crash (CVE-2014-3467).

It was discovered that libtasn1 library function asn1_get_bit_der() could incorrectly report negative bit length of the value read from ASN.1 input. This could possibly lead to an out of bounds access in an application using libtasn1, for example in case if application tried to terminate read value with NUL byte (CVE-2014-3468).

A NULL pointer dereference flaw was found in libtasn1's asn1_read_value_type() / asn1_read_value() function. If an application called the function with a NULL value for an ivalue argument to determine the amount of memory needed to store data to be read from the ASN.1 input, libtasn1 could incorrectly attempt to dereference the NULL pointer, causing an application using the library to crash (CVE-2014-3469).

These are all security issues fixed in the libtasn1-4.9-1.3 package on the GA media of openSUSE Tumbleweed.

libtasn1 has been updated to fix three security issues:

* asn1_get_bit_der() could have returned negative bit length
  (CVE-2014-3468)
* Multiple boundary check issues could have allowed DoS (CVE-2014-3467)
* Possible DoS by NULL pointer dereference in asn1_read_value_type
  (CVE-2014-3469)

Security Issues:

* CVE-2014-3468
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3468>
* CVE-2014-3467
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3467>
* CVE-2014-3469
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3469>

The asn1_get_bit_der function in GNU Libtasn1 before 3.6 does not properly report an error when a negative bit length is identified, which allows context-dependent attackers to cause out-of-bounds access via crafted ASN.1 data.

It was discovered that Libtasn1 incorrectly handled certain ASN.1 data structures. An attacker could exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service. (CVE-2014-3467)

It was discovered that Libtasn1 incorrectly handled negative bit lengths. An attacker could exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-3468)

It was discovered that Libtasn1 incorrectly handled certain ASN.1 data. An attacker could exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service. (CVE-2014-3469)