CVE-2015-7855

NTP 4.2.8p3 - Denial of Service

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.

La función decodenetnum en ntpd en NTP 4.2.x en versiones anteriores a 4.2.8p4, y 4.3.x en versiones anteriores a 4.3.77 permite que atacantes remotos provoquen una denegación de servicio (fallo de aserción) empleando un paquete en modo 6 o modo 7 que contiene un valor de datos largo.

NTP version 4.2.8p3 suffers from a denial of service vulnerability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-10-16 CVE Reserved
2015-10-21 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2024-09-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (11)

URL	Tag	Source
http://www.securityfocus.com/bid/77283	Third Party Advisory
http://www.securitytracker.com/id/1033951	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1274264	Issue Tracking
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf	Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839	Third Party Advisory
https://security.netapp.com/advisory/ntap-20171004-0001	Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/40840	2024-08-06

URL	Date	SRC
http://support.ntp.org/bin/view/Main/NtpBug2922	2021-04-19

URL	Date	SRC
http://www.debian.org/security/2015/dsa-3388	2021-04-19
https://security.gentoo.org/glsa/201607-15	2021-04-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Siemens Search vendor "Siemens"	Tim 4r-ie Firmware Search vendor "Siemens" for product "Tim 4r-ie Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Tim 4r-ie Search vendor "Siemens" for product "Tim 4r-ie"	-	-	Safe
Siemens Search vendor "Siemens"	Tim 4r-ie Dnp3 Firmware Search vendor "Siemens" for product "Tim 4r-ie Dnp3 Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Tim 4r-ie Dnp3 Search vendor "Siemens" for product "Tim 4r-ie Dnp3"	-	-	Safe
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				>= 4.2.0 < 4.2.8 Search vendor "Ntp" for product "Ntp" and version " >= 4.2.0 < 4.2.8"		-		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				>= 4.3.0 < 4.3.77 Search vendor "Ntp" for product "Ntp" and version " >= 4.3.0 < 4.3.77"		-		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		-		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta4		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta5		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-rc1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-rc2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2-rc1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2-rc2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2-rc3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3-rc1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3-rc2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3-rc3		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Netapp Search vendor "Netapp"		Oncommand Balance Search vendor "Netapp" for product "Oncommand Balance"				-		-		Affected
Netapp Search vendor "Netapp"		Oncommand Performance Manager Search vendor "Netapp" for product "Oncommand Performance Manager"				-		-		Affected
Netapp Search vendor "Netapp"		Oncommand Unified Manager Search vendor "Netapp" for product "Oncommand Unified Manager"				-		clustered_data_ontap		Affected
Netapp Search vendor "Netapp"		Clustered Data Ontap Search vendor "Netapp" for product "Clustered Data Ontap"				-		-		Affected
Netapp Search vendor "Netapp"		Data Ontap Search vendor "Netapp" for product "Data Ontap"				-		7-mode		Affected