FreeBSD 8.4/9.3/10.1 TCP Reassembly resource consumption

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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD 8.4/9.3/10.1. It has been classified as problematic. This affects an unknown part of the component TCP Reassembly Handler. This manipulation causes resource consumption. This vulnerability is tracked as CVE-2015-1417. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in FreeBSD 8.4/9.3/10.1 (Operating System) and classified as problematic. Affected by this vulnerability is an unknown code block of the component TCP Reassembly Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability.

The weakness was disclosed 07/28/2015 by Patrick Kelsey with Norse Corporation as FreeBSD-SA-15:15.tcp as confirmed advisory (Website). The advisory is shared at security.FreeBSD.org. This vulnerability is known as CVE-2015-1417 since 01/27/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The advisory points out:

There is a mistake with the introduction of VNET, which converted the global limit on the number of segments that could belong to reassembly queues into a per-VNET limit. Because mbufs are allocated from a global pool, in the presence of a sufficient number of VNETs, the total number of mbufs attached to reassembly queues can grow to the total number of mbufs in the system, at which point all network traffic would cease.

The vulnerability scanner Nessus provides a plugin with the ID 92891 (FreeBSD : FreeBSD -- Resource exhaustion in TCP reassembly (0cb9d5bb-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.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (92891), SecurityFocus (BID 76112†), SecurityTracker (ID 1033111†) and Vulnerability Center (SBV-51697†). The entry VDB-76836 is pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
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: 92891
Nessus Name: FreeBSD : FreeBSD -- Resource exhaustion in TCP reassembly (0cb9d5bb-600a-11e6-a6c3-14dae9d210b8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/27/2015 🔍
07/28/2015 +182 days 🔍
07/28/2015 +0 days 🔍
07/28/2015 +0 days 🔍
07/29/2015 +1 days 🔍
07/29/2015 +0 days 🔍
08/02/2015 +4 days 🔍
07/25/2017 +723 days 🔍
06/07/2022 +1778 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: FreeBSD-SA-15:15.tcp
Researcher: Patrick Kelsey
Organization: Norse Corporation
Status: Confirmed

CVE: CVE-2015-1417 (🔍)
GCVE (CVE): GCVE-0-2015-1417
GCVE (VulDB): GCVE-100-76837
SecurityFocus: 76112 - FreeBSD 'netinet/tcp_reass.c' Denial of Service Vulnerability
SecurityTracker: 1033111 - FreeBSD TCP Reassembly Flaw Lets Remote Users Consume Excessive Memory Resources
Vulnerability Center: 51697 - FreeBSD 8.x, 9.x, 10.x Remote DoS Vulnerability in VENT due to Resource Exhaustion in TCP Reassembly, High

See also: 🔍

Entryinfo

Created: 07/29/2015 17:58
Updated: 06/07/2022 07:46
Changes: 07/29/2015 17:58 (76), 08/03/2017 08:45 (4), 06/07/2022 07:41 (4), 06/07/2022 07:46 (1)
Complete: 🔍
Cache ID: 216::103

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