Digium Asterisk up to 12.8.0/13.1.0 PJSIP Channel Driver SDP Offer Leak resource management

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.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Digium Asterisk up to 12.8.0/13.1.0. It has been rated as problematic. This impacts an unknown function of the component PJSIP Channel Driver. The manipulation as part of SDP Offer leads to resource management (Leak). This vulnerability is uniquely identified as CVE-2015-1558. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Digium Asterisk up to 12.8.0/13.1.0 (Communications System). It has been rated as problematic. This issue affects an unknown function of the component PJSIP Channel Driver. The manipulation as part of a SDP Offer leads to a resource management vulnerability (Leak). Using CWE to declare the problem leads to CWE-399. Impacted is availability.

The weakness was disclosed 01/09/2015 as AST-2015-001 as confirmed advisory (Website). The advisory is shared at downloads.digium.com. The identification of this vulnerability is CVE-2015-1558 since 02/08/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 81096 (FreeBSD : asterisk -- File descriptor leak when incompatible codecs are offered (2eeb6652-a7a6-11e4-96ba-001999f8d30b)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks.

Upgrading to version 12.8.1 or 13.1.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (81096) and SecurityTracker (ID 1031661†). The entry VDB-74140 is pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Communications System

Vendor

• Digium

Name

• Asterisk

Version

• 12.0
• 12.1
• 12.2
• 12.3
• 12.4
• 12.5
• 12.6
• 12.7
• 12.8.0
• 13.0
• 13.1.0

License

• open-source

Website

• Vendor: https://www.digium.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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

Name: Leak
Class: Resource management / Leak
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 81096
Nessus Name: FreeBSD : asterisk -- File descriptor leak when incompatible codecs are offered (2eeb6652-a7a6-11e4-96ba-001999f8d30b)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Asterisk 12.8.1/13.1.1

Timelineinfo

01/06/2015 🔍
01/09/2015 +3 days 🔍
01/29/2015 +20 days 🔍
01/29/2015 +0 days 🔍
02/08/2015 +10 days 🔍
02/09/2015 +1 days 🔍
03/07/2022 +2583 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: AST-2015-001
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-1558 (🔍)
GCVE (CVE): GCVE-0-2015-1558
GCVE (VulDB): GCVE-100-68957
SecurityTracker: 1031661 - Asterisk File Descriptor Leak Lets Remote Authenticated Users Deny Service

See also: 🔍

Entryinfo

Created: 01/29/2015 16:08
Updated: 03/07/2022 23:02
Changes: 01/29/2015 16:08 (51), 07/09/2017 08:14 (14), 03/07/2022 22:51 (3), 03/07/2022 23:02 (1)
Complete: 🔍
Cache ID: 216::103

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Discussion

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