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Ubuntu Security Notice USN-1451-1

Ubuntu Security Notice USN-1451-1
Posted May 25, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1451-1 - Ivan Nestlerode discovered that the Cryptographic Message Syntax (CMS) and PKCS #7 implementations in OpenSSL returned early if RSA decryption failed. This could allow an attacker to expose sensitive information via a Million Message Attack (MMA). It was discovered that an integer underflow was possible when using TLS 1.1, TLS 1.2, or DTLS with CBC encryption. This could allow a remote attacker to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2012-0884, CVE-2012-2333, CVE-2012-0884, CVE-2012-2333
MD5 | b8cc47d8f5416ce1152fba137dfd8f1a

Ubuntu Security Notice USN-1451-1

Change Mirror Download
Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-1451-1
May 24, 2012

openssl vulnerabilities
==========================================================================
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:

Applications using OpenSSL in certain situations could be made to
crash or expose sensitive information.

Software Description:
- openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

Ivan Nestlerode discovered that the Cryptographic Message Syntax
(CMS) and PKCS #7 implementations in OpenSSL returned early if RSA
decryption failed. This could allow an attacker to expose sensitive
information via a Million Message Attack (MMA). (CVE-2012-0884)

It was discovered that an integer underflow was possible when using
TLS 1.1, TLS 1.2, or DTLS with CBC encryption. This could allow a
remote attacker to cause a denial of service. (CVE-2012-2333)

Update instructions:

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

Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.2
openssl 1.0.1-4ubuntu5.2

Ubuntu 11.10:
libssl1.0.0 1.0.0e-2ubuntu4.6
openssl 1.0.0e-2ubuntu4.6

Ubuntu 11.04:
libssl0.9.8 0.9.8o-5ubuntu1.7
openssl 0.9.8o-5ubuntu1.7

Ubuntu 10.04 LTS:
libssl0.9.8 0.9.8k-7ubuntu8.13
openssl 0.9.8k-7ubuntu8.13

Ubuntu 8.04 LTS:
libssl0.9.8 0.9.8g-4ubuntu3.19
openssl 0.9.8g-4ubuntu3.19

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1451-1
CVE-2012-0884, CVE-2012-2333

Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.2
https://launchpad.net/ubuntu/+source/openssl/1.0.0e-2ubuntu4.6
https://launchpad.net/ubuntu/+source/openssl/0.9.8o-5ubuntu1.7
https://launchpad.net/ubuntu/+source/openssl/0.9.8k-7ubuntu8.13
https://launchpad.net/ubuntu/+source/openssl/0.9.8g-4ubuntu3.19

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