CVE-2015-5300

ntp: MITM attacker can force ntpd to make a step larger than the panic threshold

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds otherwise by responding to an unspecified number of requests from trusted sources, and leveraging a resulting denial of service (abort and restart).

La comprobación panic_gate en NTP anterior a versión 4.2.8p5 es solo habilitada nuevamente después del primer cambio al reloj del sistema que fue mayor que 128 milisegundos por defecto, permitiendo a los atacantes remotos fijar el NTP a un tiempo arbitrario cuando arranca con la opción -g, o alterar el tiempo hasta 900 segundos, de lo contrario por respuesta a un número no especificado de peticiones de fuentes de confianza y aprovechando una denegación de servicio resultante (anular y reiniciar).

It was found that ntpd did not correctly implement the threshold limitation for the '-g' option, which is used to set the time without any restrictions. A man-in-the-middle attacker able to intercept NTP traffic between a connecting client and an NTP server could use this flaw to force that client to make multiple steps larger than the panic threshold, effectively changing the time to an arbitrary value at any time.

*Credits: N/A

CVSS Scores

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

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-07-01 CVE Reserved
2015-10-27 CVE Published
2024-08-06 CVE Updated
2024-10-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-361: 7PK - Time and State

CAPEC

References (40)

URL	Tag	Source
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory5.asc	Third Party Advisory
http://seclists.org/bugtraq/2016/Feb/164	Mailing List
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html	Third Party Advisory
http://www.securityfocus.com/bid/77312	Third Party Advisory
http://www.securitytracker.com/id/1034670	Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa113	Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-15-356-01	Third Party Advisory
https://security.netapp.com/advisory/ntap-20171004-0001	X_refsource_confirm
https://support.citrix.com/article/CTX220112	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=isg3T1023885	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=isg3T1024073	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=nas8N1021264	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=ssg1S1005821	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21979393	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21980676	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21983501	Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21983506	Third Party Advisory
https://www.cs.bu.edu/~goldbe/NTPattack.html	Third Party Advisory
https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099428	Third Party Advisory
https://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html	Third Party Advisory
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://support.ntp.org/bin/view/Main/NtpBug2956	2018-10-30
http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p5_Securit	2018-10-30

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170684.html	2018-10-30
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html	2018-10-30
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html	2018-10-30
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html	2018-10-30
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html	2018-10-30
http://rhn.redhat.com/errata/RHSA-2015-1930.html	2018-10-30
http://www.debian.org/security/2015/dsa-3388	2018-10-30
http://www.ubuntu.com/usn/USN-2783-1	2018-10-30
https://bugzilla.redhat.com/show_bug.cgi?id=1271076	2015-10-26
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:02.ntp.asc	2018-10-30
https://access.redhat.com/security/cve/CVE-2015-5300	2015-10-26

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				21 Search vendor "Fedoraproject" for product "Fedora" and version "21"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				22 Search vendor "Fedoraproject" for product "Fedora" and version "22"		-		Affected
Suse Search vendor "Suse"		Linux Enterprise Debuginfo Search vendor "Suse" for product "Linux Enterprise Debuginfo"				11 Search vendor "Suse" for product "Linux Enterprise Debuginfo" and version "11"		sp2		Affected
Suse Search vendor "Suse"		Linux Enterprise Debuginfo Search vendor "Suse" for product "Linux Enterprise Debuginfo"				11 Search vendor "Suse" for product "Linux Enterprise Debuginfo" and version "11"		sp3		Affected
Suse Search vendor "Suse"		Linux Enterprise Debuginfo Search vendor "Suse" for product "Linux Enterprise Debuginfo"				11 Search vendor "Suse" for product "Linux Enterprise Debuginfo" and version "11"		sp4		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.1 Search vendor "Opensuse" for product "Leap" and version "42.1"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.2 Search vendor "Opensuse" for product "Opensuse" and version "13.2"		-		Affected
Suse Search vendor "Suse"		Linux Enterprise Desktop Search vendor "Suse" for product "Linux Enterprise Desktop"				12 Search vendor "Suse" for product "Linux Enterprise Desktop" and version "12"		-		Affected
Suse Search vendor "Suse"		Linux Enterprise Desktop Search vendor "Suse" for product "Linux Enterprise Desktop"				12 Search vendor "Suse" for product "Linux Enterprise Desktop" and version "12"		sp1		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				10 Search vendor "Suse" for product "Linux Enterprise Server" and version "10"		sp4, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp2, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp3, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp4		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12"		sp1		Affected
Suse Search vendor "Suse"		Linux Enterprise Software Development Kit Search vendor "Suse" for product "Linux Enterprise Software Development Kit"				12 Search vendor "Suse" for product "Linux Enterprise Software Development Kit" and version "12"		-		Affected
Suse Search vendor "Suse"		Linux Enterprise Software Development Kit Search vendor "Suse" for product "Linux Enterprise Software Development Kit"				12 Search vendor "Suse" for product "Linux Enterprise Software Development Kit" and version "12"		sp1		Affected
Suse Search vendor "Suse"		Manager Search vendor "Suse" for product "Manager"				2.1 Search vendor "Suse" for product "Manager" and version "2.1"		-		Affected
Suse Search vendor "Suse"		Manager Proxy Search vendor "Suse" for product "Manager Proxy"				2.1 Search vendor "Suse" for product "Manager Proxy" and version "2.1"		-		Affected
Suse Search vendor "Suse"		Openstack Cloud Search vendor "Suse" for product "Openstack Cloud"				5 Search vendor "Suse" for product "Openstack Cloud" and version "5"		-		Affected
Suse Search vendor "Suse"		Suse Linux Enterprise Server Search vendor "Suse" for product "Suse Linux Enterprise Server"				12 Search vendor "Suse" for product "Suse Linux Enterprise Server" and version "12"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				6.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Hpc Node Search vendor "Redhat" for product "Enterprise Linux Hpc Node"				6.0 Search vendor "Redhat" for product "Enterprise Linux Hpc Node" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Hpc Node Search vendor "Redhat" for product "Enterprise Linux Hpc Node"				7.0 Search vendor "Redhat" for product "Enterprise Linux Hpc Node" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Hpc Node Eus Search vendor "Redhat" for product "Enterprise Linux Hpc Node Eus"				7.1 Search vendor "Redhat" for product "Enterprise Linux Hpc Node Eus" and version "7.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus"				6.7.z Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "6.7.z"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus"				7.1 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				6.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		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
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				15.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.10"		-		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"		p4		Affected