NetFilter conntrackd code

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

A vulnerability was found in NetFilter (affected version not known) and classified as problematic. Affected by this issue is some unknown functionality of the component conntrackd. The manipulation with an unknown input leads to a code vulnerability. Using CWE to declare the problem leads to CWE-17. Impacted is availability. CVE summarizes:

conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.

The weakness was shared 08/14/2015 as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2015-6496 since 08/17/2015. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 85547 (Debian DLA-295-1 : conntrack security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168118 (OpenSuSE Security Update for conntrack-tools (openSUSE-SU-2015:1688-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.netfilter.org.

The vulnerability is also documented in the databases at X-Force (105697), Tenable (85547), SecurityFocus (BID 76450†) and Vulnerability Center (SBV-52841†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
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CVSSv2info

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Exploitinginfo

Class: Code
CWE: CWE-17
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

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Nessus ID: 85547
Nessus Name: Debian DLA-295-1 : conntrack security update
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 703341
OpenVAS Name: Debian Security Advisory DSA 3341-1 (conntrack - security update)
OpenVAS File: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
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0-Day Time: 🔍

Patch: git.netfilter.org

Timelineinfo

08/14/2015 🔍
08/14/2015 +0 days 🔍
08/14/2015 +0 days 🔍
08/17/2015 +3 days 🔍
08/19/2015 +2 days 🔍
08/24/2015 +5 days 🔍
09/21/2015 +28 days 🔍
11/18/2024 +3346 days 🔍

Sourcesinfo

Advisory: FEDORA-2015-1aee5e6f0b
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-6496 (🔍)
GCVE (CVE): GCVE-0-2015-6496
GCVE (VulDB): GCVE-100-77324

OVAL: 🔍

X-Force: 105697 - NetFilter conntrackd denial of service
SecurityFocus: 76450 - CONNTRACKD '/src/build.c' Denial of Service Vulnerability
Vulnerability Center: 52841 - Conntrack-tools 1.4.2 and earlier Remote DoS via Crafted Packets, Medium

Entryinfo

Created: 08/19/2015 11:47 AM
Updated: 11/18/2024 09:19 AM
Changes: 08/19/2015 11:47 AM (66), 01/02/2018 10:13 AM (4), 06/12/2022 03:25 PM (3), 06/12/2022 03:31 PM (1), 11/18/2024 09:19 AM (18)
Complete: 🔍
Cache ID: 18:471:40

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