CVE-2009-2726

Severity Score

7.8

*CVSS v2

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

CVSS Scores

NISTv2 7.8

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
2009-08-11 CVE Published
2024-02-16 EPSS Updated
2024-08-07 CVE Updated
2024-08-07 First Exploit
---------- 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