USN-596-1: Ruby vulnerabilities

Releases

• Ubuntu 7.10
• Ubuntu 7.04
• Ubuntu 6.10
• Ubuntu 6.06

Packages

• ruby1.8 -

Details

Chris Clark discovered that Ruby's HTTPS module did not check for
commonName mismatches early enough during SSL negotiation. If a remote
attacker were able to perform machine-in-the-middle attacks, this flaw could
be exploited to view sensitive information in HTTPS requests coming from
Ruby applications. (CVE-2007-5162)

It was discovered that Ruby's FTPTLS, telnets, and IMAPS modules
did not check the commonName when performing SSL certificate checks.
If a remote attacker were able to perform machine-in-the-middle attacks,
this flaw could be exploited to eavesdrop on encrypted communications
from Ruby applications using these protocols. (CVE-2007-5770)

Update instructions

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

Ubuntu 7.10

• libopenssl-ruby1.8 - 1.8.6.36-1ubuntu3.1
• libruby1.8 - 1.8.6.36-1ubuntu3.1

Ubuntu 7.04

• libopenssl-ruby1.8 - 1.8.5-4ubuntu2.1
• libruby1.8 - 1.8.5-4ubuntu2.1

Ubuntu 6.10

• libopenssl-ruby1.8 - 1.8.4-5ubuntu1.3
• libruby1.8 - 1.8.4-5ubuntu1.3

Ubuntu 6.06

• libopenssl-ruby1.8 - 1.8.4-1ubuntu1.4
• libruby1.8 - 1.8.4-1ubuntu1.4

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

• CVE-2007-5770
• CVE-2007-5162