CVE-2015-6496

Debian Security Advisory 3341-1

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Vulnerabilidad en conntrackd en conntrack-tools 1.4.2 y versiones anteriores, no asegura que los módulos opcionales del kernel sean cargados antes de usarlos, lo cual permite a atacantes remotos causar una denegación de servicio (caída) a través de un paquete (1) DCCP, (2) SCTP o (3) ICMPv6.

It was discovered that in certain configurations, if the relevant conntrack kernel module is not loaded, conntrackd will crash when handling DCCP, SCTP or ICMPv6 packets.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-08-17 CVE Reserved
2015-08-21 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2025-06-13 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-17: DEPRECATED: Code

CAPEC

References (8)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2015/08/14/4	Mailing List
http://www.openwall.com/lists/oss-security/2015/08/18/1	Mailing List

URL	Date	SRC
http://bugzilla.netfilter.org/show_bug.cgi?id=910	2024-08-06

URL	Date	SRC
https://git.netfilter.org/conntrack-tools/commit/?id=c392c159605956c7bd4a264ab4490e2b2704c0cd	2024-02-14

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174875.html	2024-02-14
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174883.html	2024-02-14
http://lists.opensuse.org/opensuse-updates/2015-10/msg00015.html	2024-02-14
http://www.debian.org/security/2015/dsa-3341	2024-02-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netfilter Search vendor "Netfilter"		Conntrack-tools Search vendor "Netfilter" for product "Conntrack-tools"				<= 1.4.2 Search vendor "Netfilter" for product "Conntrack-tools" and version " <= 1.4.2"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected