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.
5.0	$0-$5k	0.00

A vulnerability classified as problematic was found in Digium Asterisk (Communications System). Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect availability. The summary by CVE is:

Asterisk Open Source 1.2.26 through 1.2.30.3 and Business Edition B.2.3.5 through B.2.5.5, when realtime IAX2 users are enabled, allows remote attackers to cause a denial of service (crash) via authentication attempts involving (1) an unknown user or (2) a user using hostname matching.

The weakness was presented 12/11/2008 with Asterisk (Website). It is possible to read the advisory at vupen.com. This vulnerability is known as CVE-2008-5558 since 12/15/2008. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 38677 (GLSA-200905-01 : Asterisk: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks.

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 (47261) and Tenable (38677). See 3723 and 43925 for similar entries.

Productinfo

Type

• Communications System

Vendor

• Digium

Name

• Asterisk

Version

• 1.2.26
• 1.2.26.1
• 1.2.26.2
• 1.2.27
• 1.2.28
• 1.2.29
• 1.2.30
• 1.2.30.2
• 1.2.30.3
• B.2.3.4
• B.2.3.5
• B.2.5.0
• B.2.5.1
• B.2.5.3

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: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
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: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 38677
Nessus Name: GLSA-200905-01 : Asterisk: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 63940
OpenVAS Name: Gentoo Security Advisory GLSA 200905-01 (asterisk)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/09/2008 🔍
12/10/2008 +1 days 🔍
12/11/2008 +1 days 🔍
12/11/2008 +0 days 🔍
12/11/2008 +0 days 🔍
12/15/2008 +3 days 🔍
12/17/2008 +2 days 🔍
05/04/2009 +138 days 🔍
05/11/2009 +7 days 🔍
03/17/2015 +2136 days 🔍
08/03/2021 +2331 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: vupen.com⛔
Organization: Asterisk
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2008-5558 (🔍)
X-Force: 47261
SecurityTracker: 1021378 - Asterisk Realtime Configuration API Bug Lets Remote Users Deny Service
Vulnerability Center: 21972 - Digium Asterisk Open Source and Business Edition Realtime IAX2 Remote DoS Vulnerability, Medium
SecurityFocus: 32773 - Asterisk IAX2 Unauthenticated Session Handling Remote Denial of Service Vulnerability
Secunia: 34982 - Gentoo update for asterisk, Moderately Critical
OSVDB: 50675 - Asterisk IAX2 Realtime Hostname Handling User Authentication Remote DoS
Vupen: ADV-2008-3403

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/03/2021 15:35
Changes: 03/17/2015 16:11 (63), 12/24/2017 09:36 (18), 08/03/2021 15:35 (3)
Complete: 🔍

Discussion

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