SmoothWall Project Security Advisory SWP-2004:001

[William Anderson <neuro () smoothwall org>]

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 SmoothWall Project Security Advisory SWP-2004:001
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    Summary: Updates for SmoothWall Express to correct
             local vulnerabilities in Linux kernel.
 Importance: Critical
      Issue: Possible local vulnerabilities
  CVE Names: CAN-2003-0961, CAN-2003-0984, CAN-2003-0985
   Released: 2004-01-12
SW-specific: no

Affected Products:

  SmoothWall Express 2.0 (as shipped)

The products shown must be updated to the fix level as
shown above before applying any updates mentioned in this
advisory.

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 Description
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Critical security vulnerabilities have been found in the
Linux kernel in the following areas:

- Locally exploitable vulnerabilities in memory management
  code (do_brk(), mremap system calls)
- Improper structure initialisation in real time clock (RTC)
  routines can result in leaked kernel data to user space

These vulnerabilities can result in privilege escalation or
unwanted availability of sensitive information.

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 Corrective Actions
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You should download and install the required update for
your product(s).  The updates can be downloaded from the
web links below, along with installation instructions and
any further caveats or updates.

SmoothWall Express 2.0 fixes 1
- http://smoothwall.org/p/2.0-fixes1.html

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 Further Information
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CVE Candidate CAN-2003-0961
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0961
CVE Candidate CAN-2003-0984
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0984
CVE Candidate CAN-2003-0985
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0985
CERT(r) VU Note (do_brk())
- http://www.kb.cert.org/vuls/id/301156
CERT(r) VU Note (memory deallocation)
- http://www.kb.cert.org/vuls/id/935264
Linux Kernel do_brk() Lacks Argument Bound Checking
- http://isec.pl/vulnerabilities/isec-0012-do_brk.txt
Linux Kernel RTC Memory Leak
- http://xforce.iss.net/xforce/xfdb/13943
Linux Kernel do_mremap Local Privilege Escalation
- http://isec.pl/vulnerabilities/isec-0013-mremap.txt
Linux Kernel 2.4.23 Changelog
- http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.23
Linux Kernel 2.4.24 Changelog
- http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.24