FreeBSD 8.3/8.4/9.1/9.2/10.0 TCP Reassembly memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.6$0-$5k0.00

A vulnerability classified as problematic has been found in FreeBSD 8.3/8.4/9.1/9.2/10.0 (Operating System). Affected is an unknown function of the component TCP Reassembly Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability. CVE summarizes:

The TCP reassembly function in the inet module in FreeBSD 8.3 before p16, 8.4 before p9, 9.1 before p12, 9.2 before p5, and 10.0 before p2 allows remote attackers to cause a denial of service (undefined memory access and system crash) or possibly read system memory via multiple crafted packets, related to moving a reassemble queue entry to the segment list when the queue is full.

The weakness was shared 04/30/2014 by Jonathan Looney as FreeBSD-SA-14:08.tcp as confirmed advisory (Website). The advisory is shared for download at freebsd.org. This vulnerability is traded as CVE-2014-3000 since 04/25/2014. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The advisory points out:

FreeBSD may add a reassemble queue entry on the stack into the segment list when the reassembly queue reaches its limit. The memory from the stack is undefined after the function returns. Subsequent iterations of the reassembly function will attempt to access this entry.

The vulnerability scanner Nessus provides a plugin with the ID 74374 (Debian DSA-2952-1 : kfreebsd-9 - 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.

Applying the patch SA-14:08 is able to eliminate this problem. The bugfix is ready for download at security.FreeBSD.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

It is possible to defend to these attacks by doing traffic normalization using a firewall. This can be done by including the following /etc/pf.conf configuration: scrub in all
Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 16254.

The vulnerability is also documented in the databases at X-Force (92976) and Tenable (74374). The entries 12858 and 13483 are related to this item.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

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

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 74374
Nessus Name: Debian DSA-2952-1 : kfreebsd-9 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 702952
OpenVAS Name: Debian Security Advisory DSA 2952-1 (kfreebsd-9 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: SA-14:08
TippingPoint: 🔍
Fortigate IPS: 🔍

Timelineinfo

04/25/2014 🔍
04/30/2014 +5 days 🔍
04/30/2014 +0 days 🔍
04/30/2014 +0 days 🔍
04/30/2014 +0 days 🔍
04/30/2014 +0 days 🔍
04/30/2014 +0 days 🔍
04/30/2014 +0 days 🔍
05/01/2014 +1 days 🔍
05/02/2014 +1 days 🔍
06/19/2021 +2605 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: FreeBSD-SA-14:08.tcp
Researcher: Jonathan Looney
Status: Confirmed

CVE: CVE-2014-3000 (🔍)
OVAL: 🔍

X-Force: 92976 - FreeBSD TCP reassembly function denial of service, Medium Risk
SecurityTracker: 1030172 - FreeBSD TCP Reassembly Flaw Lets Remote Users Deny Service
Vulnerability Center: 44364 - FreeBSD Remote DoS and Information Disclosure via a Crafted TCP Stream, Medium
SecurityFocus: 67153 - FreeBSD CVE-2014-3000 Remote Denial of Service Vulnerability
Secunia: 58293 - FreeBSD TCP Reassembly Denial of Service Vulnerability, Moderately Critical

See also: 🔍

Entryinfo

Created: 04/30/2014 22:13
Updated: 06/19/2021 08:40
Changes: 04/30/2014 22:13 (77), 05/27/2017 10:34 (13), 06/19/2021 08:40 (3)
Complete: 🔍
Cache ID: 3:A87:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!