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.
5.9	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in OpenBSD up to 4.4 (Operating System). Affected is the function fts_build of the file fts.c. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on availability. CVE summarizes:

Integer overflow in the fts_build function in fts.c in libc in (1) OpenBSD 4.4 and earlier and (2) Microsoft Interix 6.0 build 10.0.6030.0 allows context-dependent attackers to cause a denial of service (application crash) via a deep directory tree, related to the fts_level structure member, as demonstrated by (a) du, (b) rm, (c) chmod, and (d) chgrp on OpenBSD; and (e) SearchIndexer.exe on Vista Enterprise.

The weakness was shared 03/09/2009 by Maksymilian Arciemowicz (Website). The advisory is shared for download at securitytracker.com. This vulnerability is traded as CVE-2009-0537 since 02/12/2009. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

A public exploit has been developed by SecurityReason and been published even before and not after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (49109) and Exploit-DB (8163).

Productinfo

Type

• Operating System

Name

• OpenBSD

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 4.0
• 4.1
• 4.2
• 4.3
• 4.4

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: SecurityReason
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

OpenVAS ID: 63506
OpenVAS Name: Ubuntu USN-726-1 (curl)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/12/2009 🔍
03/04/2009 +20 days 🔍
03/05/2009 +1 days 🔍
03/05/2009 +0 days 🔍
03/05/2009 +0 days 🔍
03/09/2009 +4 days 🔍
03/09/2009 +0 days 🔍
03/09/2009 +0 days 🔍
01/14/2013 +1407 days 🔍
03/17/2015 +792 days 🔍
04/23/2017 +768 days 🔍

Sourcesinfo

Advisory: securitytracker.com⛔
Researcher: Maksymilian Arciemowicz
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0537 (🔍)
X-Force: 49109
SecurityTracker: 1021818 - OpenBSD libc fts Function Bug Lets Local Users Deny Service
Vulnerability Center: 38027 - Microsoft Interix and OpenBSD \x27fts_build\x27 Function Allows Local DoS via a Deep Directory Tree, Low
SecurityFocus: 34008 - Multiple Vendor libc 'fts.c' Denial of Service Vulnerability

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

Entryinfo

Created: 03/17/2015 23:38
Updated: 04/23/2017 14:18
Changes: 03/17/2015 23:38 (61), 04/23/2017 14:18 (16)
Complete: 🔍

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