The remote Oracle Linux host is missing a security update.
From Red Hat Security Advisory 2013:0982 :
An updated thunderbird package that fixes several security issues is
now available for Red Hat Enterprise Linux 5 and 6.
The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.
Mozilla Thunderbird is a standalone mail and newsgroup client.
Several flaws were found in the processing of malformed content.
Malicious content could cause Thunderbird to crash or, potentially,
execute arbitrary code with the privileges of the user running
Thunderbird. (CVE-2013-1682, CVE-2013-1684, CVE-2013-1685,
CVE-2013-1686, CVE-2013-1687, CVE-2013-1690)
It was found that Thunderbird allowed data to be sent in the body of
XMLHttpRequest (XHR) HEAD requests. In some cases this could allow
attackers to conduct Cross-Site Request Forgery (CSRF) attacks.
Timing differences in the way Thunderbird processed SVG image files
could allow an attacker to read data across domains, potentially
leading to information disclosure. (CVE-2013-1693)
Two flaws were found in the way Thunderbird implemented some of its
internal structures (called wrappers). An attacker could use these
flaws to bypass some restrictions placed on them. This could lead to
unexpected behavior or a potentially exploitable crash.
Red Hat would like to thank the Mozilla project for reporting these
issues. Upstream acknowledges Gary Kwong, Jesse Ruderman, Andrew
McCreight, Abhishek Arya, Mariusz Mlynski, Nils, Johnathan Kuskos,
Paul Stone, Boris Zbarsky, and moz_bug_r_a4 as the original reporters
of these issues.
Note: All of the above issues cannot be exploited by a specially
mail messages. They could be exploited another way in Thunderbird, for
example, when viewing the full remote content of an RSS feed.
All Thunderbird users should upgrade to this updated package, which
contains Thunderbird version 17.0.7 ESR, which corrects these issues.
After installing the update, Thunderbird must be restarted for the
changes to take effect.
See also :
Update the affected thunderbird package.
Risk factor :
Critical / CVSS Base Score : 10.0
Public Exploit Available : true