Linux kernel Netfilter using Network Address Translation (NAT) could leak sensitive information

linux-netfilter-information-leak (9043) The risk level is classified as MediumMedium Risk

Description:

Netfilter could allow a remote attacker to obtain sensitive information. If Network Address Translation (NAT) is being used by the firewall and is applied to the first packet of a connection, an ICMP error message could be generated by this packet, which would be sent out with the translated address. The address information sent out could allow a remote attacker to determine the Netfilter configuration and network topology information, which could be used by the attacker in preparing for further attacks against the affected network.


Consequences:

Obtain Information

Remedy:

Apply the patch for this vulnerability, as listed in Cartel S?curit? --- Security Advisory CARTSA-20020402. See References.

References:

Platforms Affected:

  • HP Secure OS 1.0
  • Linux Kernel 2.4.10
  • Linux Kernel 2.4.11
  • Linux Kernel 2.4.12
  • Linux Kernel 2.4.13
  • Linux Kernel 2.4.14
  • Linux Kernel 2.4.15
  • Linux Kernel 2.4.16
  • Linux Kernel 2.4.17
  • Linux Kernel 2.4.18
  • Linux Kernel 2.4.19 pre2
  • Linux Kernel 2.4.19 pre3
  • Linux Kernel 2.4.19 pre4
  • Linux Kernel 2.4.19 pre5
  • Linux Kernel 2.4.19 pre6
  • Linux Kernel 2.4.19 pre1
  • Linux Kernel 2.4.4
  • Linux Kernel 2.4.5
  • Linux Kernel 2.4.6
  • Linux Kernel 2.4.7
  • Linux Kernel 2.4.8
  • Linux Kernel 2.4.9
  • MandrakeSoft Mandrake Linux 8.0
  • MandrakeSoft Mandrake Linux 8.1
  • MandrakeSoft Mandrake Linux 8.2

Reported:

May 08, 2002

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