[ GLSA 200707-14 ] tcpdump: Integer overflow

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  Severity: High
     Title: tcpdump: Integer overflow
      Date: July 28, 2007
      Bugs: #184815
        ID: 200707-14

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Synopsis

A vulnerability has been discovered in tcpdump, allowing for the execution of arbitrary code, possibly with root privileges.

Background

tcpdump is a tool for capturing and inspecting network traffic.

Affected packages

     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  net-analyzer/tcpdump     < 3.9.5-r3                   >= 3.9.5-r3

Description

mu-b from Digital Labs discovered that the return value of a snprintf() call is not properly checked before being used. This could lead to an integer overflow.

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Impact

A remote attacker could send specially crafted BGP packets on a network being monitored with tcpdump, possibly resulting in the execution of arbitrary code with the privileges of the user running tcpdump, which is usually root.

Workaround

There is no known workaround at this time.

Resolution

All tcpdump users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/tcpdump-3.9.5-r3"

References

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  [ 1 ] CVE-2007-3798
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3798

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200707-14.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License

Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

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