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--------------------------------------------------------------------------
Debian Security Advisory DSA 1356-1 security@debian.org
http://www.debian.org/security/ Dann Frazier
August 31st, 2007 http://www.debian.org/security/faq
--------------------------------------------------------------------------
Package : linux-2.6
Vulnerability : several
Problem-Type : local/remote
Debian-specific: no
CVE ID : CVE-2007-2172 CVE-2007-2875 CVE-2007-3105 CVE-2007-3843
CVE-2007-4308
Several local and remote vulnerabilities have been discovered in the Linux
kernel that may lead to a denial of service or the execution of arbitrary
code. The Common Vulnerabilities and Exposures project identifies the
following problems:
CVE-2007-2172
Thomas Graf reported a typo in the IPV4 protocol handler that could
be used by a local attacker to overrun an array via crafted packets,
potentially resulting in a Denial of Service (system crash).
The DECnet counterpart of this issue was already fixed in DSA-1356.
CVE-2007-2875
iDefense reported a potential integer underflow in the cpuset filesystem
which may permit local attackers to gain access to sensitive kernel
memory. This vulnerability is only exploitable if the cpuset filesystem
is mounted.
CVE-2007-3105
The PaX Team discovered a potential buffer overflow in the random number
generator which may permit local users to cause a denial of service or
gain additional privileges. This issue is not believed to effect default
Debian installations where only root has sufficient privileges to exploit
it.
CVE-2007-3843
A coding error in the CIFS subsystem permits the use of unsigned messages
even if the client has been configured the system to enforce
signing by passing the sec=ntlmv2i mount option. This may allow remote
attackers to spoof CIFS network traffic.
CVE-2007-4308
Alan Cox reported an issue in the aacraid driver that allows unprivileged
local users to make ioctl calls which should be restricted to admin
privileges.
These problems have been fixed in the stable distribution in version
2.6.18.dfsg.1-13etch2.
The following matrix lists additional packages that were rebuilt for
compatibility with or to take advantage of this update:
Debian 4.0 (etch)
fai-kernels 1.17+etch5
user-mode-linux 2.6.18-1um-2etch4
We recommend that you upgrade your kernel package immediately and reboot
the machine. If you have built a custom kernel from the kernel source
package, you will need to rebuild to take advantage of these fixes.
Upgrade Instructions
--------------------
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
apt-get update
will update the internal database
apt-get upgrade
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 4.0 alias etch
--------------------------------
These files will probably be moved into the stable distribution on
its next update.
---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ etch/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/etch/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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