CVE-2016-4955
published 2016-07-05CVE-2016-4955: ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage)…
PriorityP433medium5.9CVSS 3.1
AVNACHPRNUINSUCNINAH
EPSS
8.77%
94.6th percentile
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | ntp | < ntp 1:4.2.8p8+dfsg-1 (bullseye) | ntp 1:4.2.8p8+dfsg-1 (bullseye) |
| novell | suse_manager | — | — |
| ntp | ntp | — | — |
| ntp | ntp | >= 0 < 1:4.2.8p8+dfsg-1 | 1:4.2.8p8+dfsg-1 |
| ntp | ntp | >= 0 < 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 | 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 |
| ntp | ntp | >= 0 < 1:4.2.8p4+dfsg-3ubuntu5.3 | 1:4.2.8p4+dfsg-3ubuntu5.3 |
| ntp | ntp | >= 4.2.0 < 4.2.8 | 4.2.8 |
| ntp | ntp | >= 4.3.0 < 4.3.93 | 4.3.93 |
| opensuse | leap | — | — |
| opensuse | opensuse | — | — |
| oracle | solaris | — | — |
| oracle | solaris | — | — |
| suse | linux_enterprise_desktop | — | — |
| suse | linux_enterprise_server | — | — |
| suse | linux_enterprise_server | — | — |
| suse | manager_proxy | — | — |
| suse | openstack_cloud | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
osv6.5MEDIUM
vendor_ubuntu6.5MEDIUM
vendor_debian5.9MEDIUM
vendor_redhat5.9MEDIUM
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CISA ICS
Siemens SIMATIC NET CP 443-1 OPC UA
cisa_ics·2021-06-08·CVSS 5.9
[MEDIUM] Siemens SIMATIC NET CP 443-1 OPC UA
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Siemens SIMATIC NET CP 443-1 OPC UA
Last RevisedJune 08, 2021
Alert CodeICSA-21-159-11
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIMATIC NET CP 443-1 OPC UA
- Vulnerabilities: Improper Input Validation, Improper Restriction of Operations within the Bounds of a Memory Buffer, Incorrect Calculation, Classic Buffer Overflow, Improper Authentication, Race Condition, Data Processing Errors, Exposure of Sensitive Information to an Unauthorized Actor, Out-of-bounds Read
## 2. RISK EVALUATION
Succes
Ubuntu
NTP vulnerabilities
vendor_ubuntu·2016-10-05·CVSS 6.5
CVE-2015-7973 [MEDIUM] NTP vulnerabilities
Title: NTP vulnerabilities
Summary: Several security issues were fixed in NTP.
Aanchal Malhotra discovered that NTP incorrectly handled authenticated
broadcast mode. A remote attacker could use this issue to perform a replay
attack. (CVE-2015-7973)
Matt Street discovered that NTP incorrectly verified peer associations of
symmetric keys. A remote attacker could use this issue to perform an
impersonation attack. (CVE-2015-7974)
Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled
memory. An attacker could possibly use this issue to cause ntpq to crash,
resulting in a denial of service. This issue only affected Ubuntu 16.04
LTS. (CVE-2015-7975)
Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled
dangerous characters in filenames. An attacker cou
BSD
FreeBSD-SA-16:24.ntp: Multiple vulnerabilities of ntp
bsd_advisories·2016-06-04·CVSS 7.5
CVE-2016-4953 [HIGH] FreeBSD-SA-16:24.ntp: Multiple vulnerabilities of ntp
FreeBSD-SA-16:24.ntp Security Advisory
The FreeBSD Project
Topic: Multiple vulnerabilities of ntp
Category: contrib
Module: ntp
Announced: 2016-06-04
Credits: Network Time Foundation and various contributors listed below
Affects: All supported versions of FreeBSD.
Corrected: 2016-06-03 08:59:21 UTC (stable/10, 10.3-STABLE)
2016-06-04 05:46:52 UTC (releng/10.3, 10.3-RELEASE-p5)
2016-06-04 05:46:52 UTC (releng/10.2, 10.2-RELEASE-p19)
2016-06-04 05:46:52 UTC (releng/10.1, 10.1-RELEASE-p36)
2016-06-03 09:03:10 UTC (stable/9, 9.3-STABLE)
2016-06-04 05:46:52 UTC (releng/9.3, 9.3-RELEASE-p44)
CVE Name: CVE-2016-4957, CVE-2016-4953, CVE-2016-4954, CVE-2016-4955
CVE-2016-4956
For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branc
Cisco
Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
vendor_cisco·2016-06-03
CVE-2016-4953 [HIGH] Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
Multiple Cisco products incorporate a version of the Network Time Protocol daemon (ntpd) package. Versions of this package are affected by one or more vulnerabilities that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or modify the time being advertised by a device acting as a Network Time Protocol (NTP) server.
On June 2, 2016, the NTP Consortium of the Network Time Foundation released a security notice that details five issues regarding DoS vulnerabilities and logic issues that may allow an attacker to shift a system's time.
The new vulnerabilities disclosed in this document are as follows:
Network Time Protocol CRYPTO-NAK Denial of Service Vuln
Red Hat
ntp: autokey association reset
vendor_redhat·2016-06-02·CVSS 5.9
CVE-2016-4955 [MEDIUM] ntp: autokey association reset
ntp: autokey association reset
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Mitigation: Disable autokey authentication. Instead, configure ntp to use symmetric key authentication, or no authentication at all (if not required). To configure ntp with symmetric key authentication, follow the steps at https://access.redhat.com/solutions/393663
Package: ntp (Red Hat Enterprise Linux 5) - Will not fix
Package: ntp (Red Hat Enterprise Linux 6) - Will not fix
Package: ntp (Red Hat Enterprise Linux 7) - Will not fix
Debian
CVE-2016-4955: ntp - ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers...
vendor_debian·2016·CVSS 5.9
CVE-2016-4955 [MEDIUM] CVE-2016-4955: ntp - ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers...
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Scope: local
bullseye: resolved (fixed in 1:4.2.8p8+dfsg-1)
Cisco
Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
vendor_cisco
CVE-2016-4955 Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
CVE-2016-4955: Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
Multiple Cisco products incorporate a version of the Network Time Protocol daemon (ntpd) package. Versions of this package are affected by one or more vulnerabilities that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or modify the time being advertised by a device acting as a Network Time Protocol (NTP) server. On June 2, 2016, the NTP Consortium of the Network Time Foundation released a security notice that
Bug IDs: CSCuz92606, CSCuz92609, CSCuz92629, CSCuz92606, CSCuz92609
GHSA
GHSA-c9r5-4837-463p: ntpd in NTP 4
ghsa_unreviewed·2022-05-13
CVE-2016-4955 [MEDIUM] CWE-362 GHSA-c9r5-4837-463p: ntpd in NTP 4
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
OSV
ntp vulnerabilities
osv·2016-10-05·CVSS 6.5
CVE-2015-7973 [MEDIUM] ntp vulnerabilities
ntp vulnerabilities
Aanchal Malhotra discovered that NTP incorrectly handled authenticated
broadcast mode. A remote attacker could use this issue to perform a replay
attack. (CVE-2015-7973)
Matt Street discovered that NTP incorrectly verified peer associations of
symmetric keys. A remote attacker could use this issue to perform an
impersonation attack. (CVE-2015-7974)
Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled
memory. An attacker could possibly use this issue to cause ntpq to crash,
resulting in a denial of service. This issue only affected Ubuntu 16.04
LTS. (CVE-2015-7975)
Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled
dangerous characters in filenames. An attacker could possibly use this
issue to overwrite arbitrary files. (CV
OSV
CVE-2016-4955: ntpd in NTP 4
osv·2016-07-05·CVSS 5.9
CVE-2016-4955 [MEDIUM] CVE-2016-4955: ntpd in NTP 4
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2015-8139 CVE-2016-4954 CVE-2016-4955 CVE-2016-4956 ntp: various flaws [fedora-all]
bugzilla·2016-06-02·CVSS 5.3
CVE-2015-8139 [MEDIUM] CVE-2015-8139 CVE-2016-4954 CVE-2016-4955 CVE-2016-4956 ntp: various flaws [fedora-all]
CVE-2015-8139 CVE-2016-4954 CVE-2016-4955 CVE-2016-4956 ntp: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported ve
Bugzilla
CVE-2016-4955 ntp: autokey association reset
bugzilla·2016-05-30·CVSS 5.9
CVE-2016-4955 [MEDIUM] CVE-2016-4955 ntp: autokey association reset
CVE-2016-4955 ntp: autokey association reset
The following flaw was found in NTP:
An attacker can send a spoofed packet with an invalid MAC or crypto-NAK to a client/peer and reset its association if it's using autokey for authentication. If this can be done often enough, it will prevent that association from working.
Discussion:
Acknowledgments:
Name: Miroslav Lichvar (Red Hat)
---
Created ntp tracking bugs for this issue:
Affects: fedora-all [bug 1342128]
---
Upstream bug:
http://support.ntp.org/bin/view/Main/NtpBug3043
External References:
http://support.ntp.org/bin/view/Main/SecurityNotice#June_2016_ntp_4_2_8p8_NTP_Securi
---
Could anyone suggest any specific reason of closing the bug without fixing it. Secondly advisory for customers who have these vulnerabilities
---
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2016-07-05
Published