Ubuntu Security Notice USN-596-1
26th March, 2008
ruby1.8 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.10
- Ubuntu 7.04
- Ubuntu 6.10
- Ubuntu 6.06 LTS
Software description
- 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 man-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 man-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 version:
- 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 LTS:
- libopenssl-ruby1.8 1.8.4-1ubuntu1.4
- libruby1.8 1.8.4-1ubuntu1.4
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.