FreeBSD 5.2/5.2.1/5.3/5.4/5.5 i386_set_ldt integer coercion

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

A vulnerability classified as problematic has been found in FreeBSD 5.2/5.2.1/5.3/5.4/5.5 (Operating System). This affects the function i386_set_ldt. The manipulation with an unknown input leads to a integer coercion vulnerability. CWE is classifying the issue as CWE-192. Integer coercion refers to a set of flaws pertaining to the type casting, extension, or truncation of primitive data types. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow vulnerability in the i386_set_ldt call in FreeBSD 5.5, and possibly earlier versions down to 5.2, allows local users to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2006-4178.

The weakness was published 09/26/2006 by Adriano Lima with iDefense (Website). The advisory is shared at idefense.com. This vulnerability is uniquely identified as CVE-2006-4172 since 08/16/2006. The attack needs to be done within the local network. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed in ANSI C. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

Upgrading to version 1.96 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.FreeBSD.org. The problem might be mitigated by replacing the product with as an alternative. The best possible mitigation is suggested to be establishing an alternative product.

The vulnerability is also documented in the vulnerability database at X-Force (29132). Similar entry is available at 32449.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Integer coercion
CWE: CWE-192 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

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EPSS Percentile: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Alternative
Status: 🔍
Upgrade: FreeBSD 1.96
Patch: ftp.FreeBSD.org

Timelineinfo

08/16/2006 🔍
09/23/2006 +38 days 🔍
09/25/2006 +2 days 🔍
09/26/2006 +1 days 🔍
09/26/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/26/2006 +0 days 🔍
09/27/2006 +0 days 🔍
04/22/2018 +4225 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: idefense.com⛔
Researcher: Adriano Lima
Organization: iDefense
Status: Confirmed

CVE: CVE-2006-4172 (🔍)
X-Force: 29132 - FreeBSD i386_set_ldt() integer overflow, High Risk
SecurityTracker: 1016928
SecurityFocus: 20158 - FreeBSD I386_Set_LDT() Multiple Local Denial of Service Vulnerabilities
Secunia: 22064 - FreeBSD "i386_set_ldt()" Integer Overflow / Signedness Vulnerabilities, Not Critical
OSVDB: 29167 - FreeBSD i386_set_ldt() Local Overflow DoS

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/27/2006 12:03
Updated: 04/22/2018 13:13
Changes: 09/27/2006 12:03 (76), 04/22/2018 13:13 (8)
Complete: 🔍

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