Executive Summary
Summary | |
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Title | ntp security, bug fix, and enhancement update |
Informations | |||
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Name | RHSA-2015:2231 | First vendor Publication | 2015-11-19 |
Vendor | RedHat | Last vendor Modification | 2015-11-19 |
Severity (Vendor) | Moderate | Revision | 04 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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Overall CVSS Score | NA | ||
Base Score | NA | Environmental Score | NA |
impact SubScore | NA | Temporal Score | NA |
Exploitabality Sub Score | NA | ||
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P) | |||
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Cvss Base Score | 6.8 | Attack Range | Network |
Cvss Impact Score | 6.4 | Attack Complexity | Medium |
Cvss Expoit Score | 8.6 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
Problem Description: Updated ntp packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64 3. Description: The Network Time Protocol (NTP) is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. It was found that because NTP's access control was based on a source IP address, an attacker could bypass source IP restrictions and send malicious control and configuration packets by spoofing ::1 addresses. (CVE-2014-9298, CVE-2014-9751) A denial of service flaw was found in the way NTP hosts that were peering with each other authenticated themselves before updating their internal state variables. An attacker could send packets to one peer host, which could cascade to other peers, and stop the synchronization process among the reached peers. (CVE-2015-1799) A flaw was found in the way the ntp-keygen utility generated MD5 symmetric keys on big-endian systems. An attacker could possibly use this flaw to guess generated MD5 keys, which could then be used to spoof an NTP client or server. (CVE-2015-3405) A stack-based buffer overflow was found in the way the NTP autokey protocol was implemented. When an NTP client decrypted a secret received from an NTP server, it could cause that client to crash. (CVE-2014-9297, CVE-2014-9750) It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key. (CVE-2015-1798) The CVE-2015-1798 and CVE-2015-1799 issues were discovered by Miroslav Lichvár of Red Hat. Bug fixes: * The ntpd service truncated symmetric keys specified in the key file to 20 bytes. As a consequence, it was impossible to configure NTP authentication to work with peers that use longer keys. With this update, the maximum key length has been changed to 32 bytes. (BZ#1191111) * The ntpd service could previously join multicast groups only when starting, which caused problems if ntpd was started during system boot before network was configured. With this update, ntpd attempts to join multicast groups every time network configuration is changed. (BZ#1207014) * Previously, the ntp-keygen utility used the exponent of 3 when generating RSA keys. Consequently, generating RSA keys failed when FIPS mode was enabled. With this update, ntp-keygen has been modified to use the exponent of 65537, and generating keys in FIPS mode now works as expected. (BZ#1191116) * The ntpd service dropped incoming NTP packets if their source port was lower than 123 (the NTP port). With this update, ntpd no longer checks the source port number, and clients behind NAT are now able to correctly synchronize with the server. (BZ#1171640) Enhancements: * This update adds support for configurable Differentiated Services Code Points (DSCP) in NTP packets, simplifying configuration in large networks where different NTP implementations or versions are using different DSCP values. (BZ#1202828) * This update adds the ability to configure separate clock stepping thresholds for each direction (backward and forward). Use the "stepback" and "stepfwd" options to configure each threshold. (BZ#1193154) * Support for nanosecond resolution has been added to the Structural Health Monitoring (SHM) reference clock. Prior to this update, when a Precision Time Protocol (PTP) hardware clock was used as a time source to synchronize the system clock, the accuracy of the synchronization was limited due to the microsecond resolution of the SHM protocol. The nanosecond extension in the SHM protocol now allows sub-microsecond synchronization of the system clock. (BZ#1117702) All ntp users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1117702 - SHM refclock doesn't support nanosecond resolution 1122012 - SHM refclock allows only two units with owner-only access 1171640 - NTP drops requests when sourceport is below 123 1180721 - ntp: mreadvar command crash in ntpq 1184572 - CVE-2014-9298 CVE-2014-9751 ntp: drop packets with source address ::1 1184573 - CVE-2014-9297 CVE-2014-9750 ntp: vallen in extension fields are not validated 1191108 - ntpd should warn when monitoring facility can't be disabled due to restrict configuration 1191122 - ntpd -x steps clock on leap second 1193154 - permit differential fwd/back threshold for step vs. slew [PATCH] 1199430 - CVE-2015-1798 ntp: ntpd accepts unauthenticated packets with symmetric key crypto 1199435 - CVE-2015-1799 ntp: authentication doesn't protect symmetric associations against DoS attacks 1210324 - CVE-2015-3405 ntp: ntp-keygen may generate non-random symmetric keys on big-endian systems |
Original Source
Url : https://rhn.redhat.com/errata/RHSA-2015-2231.html |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
40 % | CWE-20 | Improper Input Validation |
40 % | CWE-17 | Code |
20 % | CWE-331 | Insufficient Entropy |
OVAL Definitions
Definition Id: oval:org.mitre.oval:def:28698 | |||
Oval ID: | oval:org.mitre.oval:def:28698 | ||
Title: | Symmetric-Key feature allows MAC address spoofing. | ||
Description: | The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2015-1798 | Version: | 3 |
Platform(s): | HP-UX 11 | Product(s): | |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:28761 | |||
Oval ID: | oval:org.mitre.oval:def:28761 | ||
Title: | Potential security vulnerabilities have been identified with HP-UX running NTP. These could be exploited remotely to execute code, create a Denial of Service (DoS), or other vulnerabilities. | ||
Description: | ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2014-9297 | Version: | 7 |
Platform(s): | HP-UX 11 | Product(s): | |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:28915 | |||
Oval ID: | oval:org.mitre.oval:def:28915 | ||
Title: | Symmetric-Key feature allows denial of service | ||
Description: | The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2015-1799 | Version: | 3 |
Platform(s): | HP-UX 11 | Product(s): | |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:29492 | |||
Oval ID: | oval:org.mitre.oval:def:29492 | ||
Title: | AIX 'NTPv4' vulnerability | ||
Description: | The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2015-1799 | Version: | 5 |
Platform(s): | IBM AIX 6.1 IBM AIX 7.1 | Product(s): | |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:29503 | |||
Oval ID: | oval:org.mitre.oval:def:29503 | ||
Title: | AIX 'NTPv4' vulnerability | ||
Description: | ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2014-9297 | Version: | 5 |
Platform(s): | IBM AIX 6.1 IBM AIX 7.1 | Product(s): | |
Definition Synopsis: | |||
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CPE : Common Platform Enumeration
Information Assurance Vulnerability Management (IAVM)
Date | Description |
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2015-02-19 | IAVM : 2015-A-0041 - Multiple Vulnerabilities in Network Time Protocol (NTP) Severity : Category I - VMSKEY : V0058907 |
Nessus® Vulnerability Scanner
Date | Description |
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2018-04-10 | Name : The remote device is missing a vendor-supplied security patch. File : cisco-sa-20150408-ntpd-iosxe.nasl - Type : ACT_GATHER_INFO |
2018-04-10 | Name : The remote device is missing a vendor-supplied security patch. File : cisco-sa-20150408-ntpd-ios.nasl - Type : ACT_GATHER_INFO |
2017-05-01 | Name : The remote EulerOS host is missing multiple security updates. File : EulerOS_SA-2016-1060.nasl - Type : ACT_GATHER_INFO |
2016-12-15 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20161103_ntp_on_SL7_x.nasl - Type : ACT_GATHER_INFO |
2016-11-28 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2016-2583.nasl - Type : ACT_GATHER_INFO |
2016-11-11 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2016-2583.nasl - Type : ACT_GATHER_INFO |
2016-11-04 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2016-2583.nasl - Type : ACT_GATHER_INFO |
2016-08-29 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-1912-1.nasl - Type : ACT_GATHER_INFO |
2016-06-09 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20160510_ntp_on_SL6_x.nasl - Type : ACT_GATHER_INFO |
2016-06-01 | Name : The remote device is affected by multiple vulnerabilities. File : cisco_ace_A5_3_3.nasl - Type : ACT_GATHER_INFO |
2016-05-17 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2016-0780.nasl - Type : ACT_GATHER_INFO |
2016-05-16 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2016-0780.nasl - Type : ACT_GATHER_INFO |
2016-05-12 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2016-0780.nasl - Type : ACT_GATHER_INFO |
2015-12-22 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20151119_ntp_on_SL7_x.nasl - Type : ACT_GATHER_INFO |
2015-12-02 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2015-2231.nasl - Type : ACT_GATHER_INFO |
2015-11-24 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2015-2231.nasl - Type : ACT_GATHER_INFO |
2015-11-20 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2015-2231.nasl - Type : ACT_GATHER_INFO |
2015-11-06 | Name : The remote device is missing a vendor-supplied security patch. File : f5_bigip_SOL17530.nasl - Type : ACT_GATHER_INFO |
2015-11-02 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-3388.nasl - Type : ACT_GATHER_INFO |
2015-10-30 | Name : The remote Slackware host is missing a security update. File : Slackware_SSA_2015-302-03.nasl - Type : ACT_GATHER_INFO |
2015-10-29 | Name : The remote Debian host is missing a security update. File : debian_DLA-335.nasl - Type : ACT_GATHER_INFO |
2015-10-29 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2015-607.nasl - Type : ACT_GATHER_INFO |
2015-10-05 | Name : The remote device is missing a vendor-supplied security patch. File : f5_bigip_SOL16393.nasl - Type : ACT_GATHER_INFO |
2015-09-25 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201509-01.nasl - Type : ACT_GATHER_INFO |
2015-09-21 | Name : The remote device is missing a vendor-supplied security patch. File : f5_bigip_SOL16506.nasl - Type : ACT_GATHER_INFO |
2015-09-16 | Name : The remote device is missing a vendor-supplied security patch. File : f5_bigip_SOL16392.nasl - Type : ACT_GATHER_INFO |
2015-09-03 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2015-593.nasl - Type : ACT_GATHER_INFO |
2015-08-25 | Name : The remote AIX host is missing a security patch. File : aix_IV74263.nasl - Type : ACT_GATHER_INFO |
2015-08-25 | Name : The remote AIX host is missing a security patch. File : aix_IV74262.nasl - Type : ACT_GATHER_INFO |
2015-08-25 | Name : The remote AIX host is missing a security patch. File : aix_IV74261.nasl - Type : ACT_GATHER_INFO |
2015-08-25 | Name : The remote AIX host is missing a security patch. File : aix_IV73783.nasl - Type : ACT_GATHER_INFO |
2015-08-04 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20150722_ntp_on_SL6_x.nasl - Type : ACT_GATHER_INFO |
2015-07-31 | Name : The remote OracleVM host is missing one or more security updates. File : oraclevm_OVMSA-2015-0102.nasl - Type : ACT_GATHER_INFO |
2015-07-30 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2015-1459.nasl - Type : ACT_GATHER_INFO |
2015-07-28 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2015-1459.nasl - Type : ACT_GATHER_INFO |
2015-07-23 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2015-1459.nasl - Type : ACT_GATHER_INFO |
2015-07-06 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-1173-1.nasl - Type : ACT_GATHER_INFO |
2015-07-02 | Name : The remote AIX host is missing a security patch. File : aix_IV71096.nasl - Type : ACT_GATHER_INFO |
2015-07-02 | Name : The remote AIX host is missing a security patch. File : aix_IV71094.nasl - Type : ACT_GATHER_INFO |
2015-07-01 | Name : The remote host is missing a Mac OS X update that fixes multiple security vul... File : macosx_SecUpd2015-005.nasl - Type : ACT_GATHER_INFO |
2015-07-01 | Name : The remote host is missing a Mac OS X update that fixes multiple security vul... File : macosx_10_10_4.nasl - Type : ACT_GATHER_INFO |
2015-05-28 | Name : A network management system on the remote host is affected by multiple vulner... File : cisco-sa-20141222-ntpd-prime_dcnm.nasl - Type : ACT_GATHER_INFO |
2015-05-21 | Name : The remote NTP server is affected by multiple vulnerabilities. File : ntp_4_2_8p2.nasl - Type : ACT_GATHER_INFO |
2015-05-20 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-0865-1.nasl - Type : ACT_GATHER_INFO |
2015-05-20 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-0322-1.nasl - Type : ACT_GATHER_INFO |
2015-05-07 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2015-520.nasl - Type : ACT_GATHER_INFO |
2015-04-29 | Name : The remote Fedora host is missing a security update. File : fedora_2015-5830.nasl - Type : ACT_GATHER_INFO |
2015-04-28 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2015-330.nasl - Type : ACT_GATHER_INFO |
2015-04-24 | Name : The remote device is missing a vendor-supplied security patch. File : f5_bigip_SOL16505.nasl - Type : ACT_GATHER_INFO |
2015-04-23 | Name : The remote Fedora host is missing a security update. File : fedora_2015-5874.nasl - Type : ACT_GATHER_INFO |
2015-04-23 | Name : The remote Fedora host is missing a security update. File : fedora_2015-5761.nasl - Type : ACT_GATHER_INFO |
2015-04-22 | Name : The remote Slackware host is missing a security update. File : Slackware_SSA_2015-111-08.nasl - Type : ACT_GATHER_INFO |
2015-04-14 | Name : The remote Ubuntu host is missing a security-related patch. File : ubuntu_USN-2567-1.nasl - Type : ACT_GATHER_INFO |
2015-04-14 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-3223.nasl - Type : ACT_GATHER_INFO |
2015-04-13 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2015-202.nasl - Type : ACT_GATHER_INFO |
2015-04-13 | Name : The remote Debian host is missing a security update. File : debian_DLA-192.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote host is missing a Mac OS X update that fixes multiple security vul... File : macosx_10_10_3.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote HP-UX host is missing a security-related patch. File : hpux_PHNE_44236.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote HP-UX host is missing a security-related patch. File : hpux_PHNE_44235.nasl - Type : ACT_GATHER_INFO |
2015-04-08 | Name : The remote FreeBSD host is missing one or more security-related updates. File : freebsd_pkg_ebd84c96dd7e11e4854e3c970e169bc2.nasl - Type : ACT_GATHER_INFO |
2015-03-30 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2015-140.nasl - Type : ACT_GATHER_INFO |
2015-03-26 | Name : The remote Debian host is missing a security update. File : debian_DLA-149.nasl - Type : ACT_GATHER_INFO |
2015-03-25 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2015-496.nasl - Type : ACT_GATHER_INFO |
2015-03-20 | Name : The remote NTP server is affected by multiple vulnerabilities. File : ntp_4_2_8.nasl - Type : ACT_GATHER_INFO |
2015-02-16 | Name : The remote Fedora host is missing a security update. File : fedora_2015-1759.nasl - Type : ACT_GATHER_INFO |
2015-02-16 | Name : The remote Fedora host is missing a security update. File : fedora_2015-1736.nasl - Type : ACT_GATHER_INFO |
2015-02-13 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2015-046.nasl - Type : ACT_GATHER_INFO |
2015-02-12 | Name : The remote SuSE 11 host is missing one or more security updates. File : suse_11_ntp-150209.nasl - Type : ACT_GATHER_INFO |
2015-02-10 | Name : The remote Ubuntu host is missing a security-related patch. File : ubuntu_USN-2497-1.nasl - Type : ACT_GATHER_INFO |
2015-02-06 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-3154.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
---|---|
2017-08-09 21:25:22 |
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2015-12-05 13:28:31 |
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2015-12-03 13:26:52 |
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2015-11-21 13:26:12 |
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2015-11-20 00:25:23 |
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