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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2015-6496)

Note that Nessus relies on the presence of the package as reported by the vendor.

Addresses a crasher (CVE-2015-6496) and various leaks

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

conntrack-tools was updated to fix one security issue.

The following vulnerability was fixed :

  - CVE-2015-6496: Fix a possible crash if conntrackd sees     DCCP, SCTP and ICMPv6 traffic and the corresponding     kernel modules that track this traffic are not     available. (boo#942149)

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.

'jann' discovered that in certain configurations, if the relevant conntrack kernel module is not loaded, conntrackd will crash when handling DCCP, SCTP or ICMPv6 packets. In the version found in Debian 6.0 'squeeze', this vulnerability only applies to ICMPv6.

For the oldoldstable distribution (squeeze), this problem has been fixed in version 1:0.9.14-2+deb6u1.

For the oldstable distribution (wheezy) and stable distribution (jessie), this problem will be fixed soon.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
218719	Linux Distros Unpatched Vulnerability : CVE-2015-6496	Nessus	Misc.	high
89254	Fedora 23 : conntrack-tools-1.4.2-9.fc23 (2015-5eb2131441)	Nessus	Fedora Local Security Checks	medium
89161	Fedora 22 : conntrack-tools-1.4.2-9.fc22 (2015-1aee5e6f0b)	Nessus	Fedora Local Security Checks	medium
86287	openSUSE Security Update : conntrack-tools (openSUSE-2015-637)	Nessus	SuSE Local Security Checks	medium
85569	Debian DSA-3341-1 : conntrack - security update	Nessus	Debian Local Security Checks	medium
85547	Debian DLA-295-1 : conntrack security update	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2015-6496

high

Tenable Plugins

high

medium

medium

medium

medium

medium