Input validation error in iptables - CVE-2012-2663

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Main Vulnerability Database Vulnerabilities #VU42032

Input validation error in iptables - CVE-2012-2663

Published: February 15, 2014 / Updated: August 10, 2020


Vulnerability identifier: #VU42032
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-2663
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: netfilter
Affected software:
iptables

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in --syn rules, which might allow remote attackers to bypass intended firewall restrictions via crafted packets. NOTE: the CVE-2012-6638 fix makes this issue less relevant.


How to mitigate CVE-2012-2663

Install update from vendor's website.

Sources