USN-2385-1: OpenSSL vulnerabilities

Releases

• Ubuntu 14.04 ESM
• Ubuntu 12.04
• Ubuntu 10.04

Packages

• openssl - Secure Socket Layer (SSL) cryptographic library and tools

Details

It was discovered that OpenSSL incorrectly handled memory when parsing
DTLS SRTP extension data. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, resulting in a denial of service.
This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2014-3513)

It was discovered that OpenSSL incorrectly handled memory when verifying
the integrity of a session ticket. A remote attacker could possibly use
this issue to cause OpenSSL to consume resources, resulting in a denial of
service. (CVE-2014-3567)

In addition, this update introduces support for the TLS Fallback Signaling
Cipher Suite Value (TLS_FALLBACK_SCSV). This new feature prevents protocol
downgrade attacks when certain applications such as web browsers attempt
to reconnect using a lower protocol version for interoperability reasons.

Update instructions

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

Ubuntu 14.04

• libssl1.0.0 - 1.0.1f-1ubuntu2.7

Ubuntu 12.04

• libssl1.0.0 - 1.0.1-4ubuntu5.20

Ubuntu 10.04

• libssl0.9.8 - 0.9.8k-7ubuntu8.22

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

References

• CVE-2014-3513
• CVE-2014-3567