FreeBSD 8.4/9.3/10.1 IPv6 Router Advertisement denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD 8.4/9.3/10.1. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component IPv6 Router Advertisement Handler. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2015-2923. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in FreeBSD 8.4/9.3/10.1 (Operating System) and classified as problematic. This vulnerability affects some unknown processing of the component IPv6 Router Advertisement Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was presented 04/07/2015 by Dennis Ljungmark as FreeBSD-SA-15:09.ipv6 as confirmed advisory (Website). The advisory is shared for download at security.FreeBSD.org. This vulnerability was named CVE-2015-2923 since 04/04/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

IPv6 nodes use the Neighbor Discovery protocol to determine the link-layer address of other nodes, find routers, and maintain reachability information. Routers advertise their presence together with various link and Internet parameters either periodically, or in response to a Router Solicitation message, using Router Advertisement (ICMPv6 type 134).

The vulnerability scanner Nessus provides a plugin with the ID 92888 (FreeBSD : FreeBSD -- Denial of Service with IPv6 Router Advertisements (0bb55a18-600a-11e6-a6c3-14dae9d210b8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175448 (Debian Security Update for kfreebsd-9 (DSA 3175-2)).

Upgrading eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting ifconfig em0 inet6 -accept_rtadv. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (102110), Tenable (92888), SecurityFocus (BID 74713†), SecurityTracker (ID 1032043†) and Vulnerability Center (SBV-50236†). See VDB-69220 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92888
Nessus Name: FreeBSD : FreeBSD -- Denial of Service with IPv6 Router Advertisements (0bb55a18-600a-11e6-a6c3-14dae9d210b8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org
Config: ifconfig em0 inet6 -accept_rtadv

Timelineinfo

04/04/2015 🔍
04/07/2015 +3 days 🔍
04/07/2015 +0 days 🔍
04/07/2015 +0 days 🔍
04/08/2015 +1 days 🔍
04/08/2015 +0 days 🔍
05/20/2015 +42 days 🔍
05/02/2022 +2539 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: FreeBSD-SA-15:09.ipv6
Researcher: Dennis Ljungmark
Status: Confirmed

CVE: CVE-2015-2923 (🔍)
GCVE (CVE): GCVE-0-2015-2923
GCVE (VulDB): GCVE-100-74668
X-Force: 102110 - FreeBSD IPv6 denial of service
SecurityFocus: 74713 - FreeBSD 'netinet6/nd6_rtr.c' Denial of Service Vulnerability
SecurityTracker: 1032043 - FreeBSD IPv6 Router Advertisement Processing Flaw Lets Remote Users Deny Service
Vulnerability Center: 50236 - FreeBSD Remote DoS via Crafted Packets, Medium

See also: 🔍

Entryinfo

Created: 04/08/2015 15:15
Updated: 05/02/2022 20:20
Changes: 04/08/2015 15:15 (63), 06/29/2017 07:18 (6), 05/02/2022 20:04 (3), 05/02/2022 20:13 (18), 05/02/2022 20:20 (1)
Complete: 🔍
Cache ID: 216:29D:103

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