| Descripción: | Summary:
The remote host is missing an update for the 'krb5-appl'
package(s) announced via the referenced advisory.
Vulnerability Insight:
The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and
rlogin clients and servers. Kerberos is a network authentication system
which allows clients and servers to authenticate to each other using
symmetric encryption and a trusted third-party, the Key Distribution Center
(KDC).
A buffer overflow flaw was found in the MIT krb5 telnet daemon
(telnetd). A remote attacker who can access the telnet port of a
target machine could use this flaw to execute arbitrary code as
root. (CVE-2011-4862)
Note that the krb5 telnet daemon is not enabled by default in any
version of Red Hat Enterprise Linux. In addition, the default firewall
rules block remote access to the telnet port. This flaw does not
affect the telnet daemon distributed in the telnet-server package.
For users who have installed the krb5-appl-servers package, have
enabled the krb5 telnet daemon, and have it accessible remotely, this
update should be applied immediately.
All krb5-appl-server users should upgrade to these updated packages,
which contain a backported patch to correct this issue.
Affected Software/OS:
krb5-appl on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)
Solution:
Please Install the Updated Packages.
CVSS Score:
10.0
CVSS Vector:
AV:N/AC:L/Au:N/C:C/I:C/A:C
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