CVE-2009-2726

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP.

El driver SIP channel en Asterisk Open Source v1.2.x anterior a v1.2.34, v1.4.x anterior a v1.4.26.1, v1.6.0.x anterior a v1.6.0.12, y v1.6.1.x anterior a v1.6.1.4; Asterisk Business Edition vA.x.x, vB.x.x anterior a vB.2.5.9, vC.2.x anterior a vC.2.4.1, y vC.3.x anterior a vC.3.1; y Asterisk Appliance s800i v1.2.x anterior a v1.3.0.3, no utiliza el ancho máximo cuando se invocan las funciones de estilo sscanf, lo que permite a atacantes remotos producir una denegación de servicio (agotamiento de la pila de memoria) a través de paquetes SIP que contienen secuencias largas de caracteres ASCII decimales, como se demostró a través de vectores relacionados con (1) el valor CSeq en una cabecera SIP, (2) valores Content-Length, y (3) SDP.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2009-08-10 CVE Reserved
2009-08-12 CVE Published
2024-08-07 CVE Updated
2024-08-07 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (7)

URL	Tag	Source
http://downloads.digium.com/pub/security/AST-2009-005.html	Product
http://labs.mudynamics.com/advisories/MU-200908-01.txt	Broken Link
http://www.securityfocus.com/archive/1/505669/100/0/threaded	Broken Link
http://www.securitytracker.com/id?1022705	Broken Link

URL	Date	SRC
http://www.securityfocus.com/bid/36015	2024-08-07

URL	Date	SRC

URL	Date	SRC
http://secunia.com/advisories/36227	2024-02-15
http://www.vupen.com/english/advisories/2009/2229	2024-02-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Digium Search vendor "Digium"	S800i Firmware Search vendor "Digium" for product "S800i Firmware"	>= 1.2.0 < 1.3.0.3 Search vendor "Digium" for product "S800i Firmware" and version " >= 1.2.0 < 1.3.0.3"	-	Affected	in	Digium Search vendor "Digium"	S800i Search vendor "Digium" for product "S800i"	-	-	Safe
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				< b.2.5.9 Search vendor "Digium" for product "Asterisk" and version " < b.2.5.9"		business		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= c.2.0 <= c.2.4.1 Search vendor "Digium" for product "Asterisk" and version " >= c.2.0 <= c.2.4.1"		business		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= c.3.0 < c.3.1 Search vendor "Digium" for product "Asterisk" and version " >= c.3.0 < c.3.1"		business		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 1.2.0 < 1.2.34 Search vendor "Digium" for product "Asterisk" and version " >= 1.2.0 < 1.2.34"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 1.4.0 < 1.4.26.1 Search vendor "Digium" for product "Asterisk" and version " >= 1.4.0 < 1.4.26.1"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 1.6.0 < 1.6.0.12 Search vendor "Digium" for product "Asterisk" and version " >= 1.6.0 < 1.6.0.12"		-		Affected
Digium Search vendor "Digium"		Asterisk Search vendor "Digium" for product "Asterisk"				>= 1.6.1 < 1.6.1.4 Search vendor "Digium" for product "Asterisk" and version " >= 1.6.1 < 1.6.1.4"		-		Affected