iptables iptables-save could leak sensitive information
| iptables-iptablessave-information-leak (11116) |  Medium Risk |
Description:
iptables firewall fails to properly save rules. The iptables-save utility saves rules that include "-reject-with icmp-host-prohibited" as "-reject-with tcp-reset", which could cause sensitive information to be returned in responses generated by iptables. A local attacker could use this information to launch further attacks against the affected system or network.
Platforms Affected:
- Jozsef Kadlecsik and others, iptables prior to 1.2.4
- RedHat, Linux 7.1
- RedHat, Linux 7.2
Remedy:
For Red Hat Linux 7.1:
Upgrade to the latest version of iptables (1.2.4-0.71.2 or later), as listed in RHSA-2001:144-04. See References.
Consequences:
Obtain Information
References:
- Red Hat Bugzilla Bug 50500, iptables-save saves --reject-with icmp-host-prohibited as --reject-with tcp-reset at http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=50500.
- BID-9284: Red Hat Linux 2.4 Kernel Multiple Potential Vulnerabilities
- CVE-2001-1387: iptables-save in iptables before 1.2.4 records the --reject-with icmp-host-prohibited rule as --reject-with tcp-reset
- RHSA-2001-144: Updated iptables packages are available
Reported:
Nov 05, 2001
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