Netfilter Core Team iptables up to 1.4.21 extensions/libxt_tcp.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Netfilter Core Team iptables. The impacted element is an unknown function in the library extensions/libxt_tcp.c. Performing a manipulation results in input validation. This vulnerability is known as CVE-2012-2663. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Netfilter Core Team iptables. This affects some unknown processing in the library extensions/libxt_tcp.c. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 02/15/2014 by Denys Fedoryshchenko as Bug 826702 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2012-2663 since 05/14/2012. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 74658 (openSUSE Security Update : Kernel (openSUSE-SU-2012:0799-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165525 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2012:0904-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (74658), SecurityFocus (BID 53733†) and Vulnerability Center (SBV-35233†). Similar entries are available at VDB-5383, VDB-5478, VDB-60962 and VDB-60961. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74658
Nessus Name: openSUSE Security Update : Kernel (openSUSE-SU-2012:0799-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/14/2012 🔍
05/30/2012 +16 days 🔍
05/30/2012 +0 days 🔍
05/31/2012 +1 days 🔍
02/15/2014 +625 days 🔍
02/15/2014 +0 days 🔍
03/25/2015 +403 days 🔍
03/15/2022 +2547 days 🔍

Sourcesinfo

Advisory: Bug 826702
Researcher: Denys Fedoryshchenko
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-2663 (🔍)
GCVE (CVE): GCVE-0-2012-2663
GCVE (VulDB): GCVE-100-69285
SecurityFocus: 53733 - Linux Kernel iptables '--syn' Rules Security Bypass Vulnerability
Vulnerability Center: 35233 - Linux Kernel 2.6 through 2.6.35 Remote Security Bypass Vulnerability via a Crafted Packets, Medium

See also: 🔍

Entryinfo

Created: 03/25/2015 16:45
Updated: 03/15/2022 06:06
Changes: 03/25/2015 16:45 (56), 04/13/2017 12:54 (11), 03/15/2022 06:06 (3)
Complete: 🔍
Cache ID: 216::103

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