Red Hat update for ntp
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2016-7426 CVE-2016-7429 CVE-2016-7433 CVE-2016-9310 CVE-2016-9311 |
| CWE-ID | CWE-399 CWE-19 CWE-682 CWE-284 CWE-476 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Red Hat Enterprise Linux EUS Compute Node Operating systems & Components / Operating system Red Hat Enterprise Linux for Scientific Computing Operating systems & Components / Operating system Red Hat Enterprise Linux for IBM z Systems Operating systems & Components / Operating system Red Hat Enterprise Linux Desktop Operating systems & Components / Operating system Red Hat Enterprise Linux Workstation Operating systems & Components / Operating system Red Hat Enterprise Linux Server Operating systems & Components / Operating system |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) Resource management errors
EUVDB-ID: #VU12303
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7426
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to rate limits responses received from the configured sources when rate limiting for all associations is enabled. A remote attacker can send responses with a spoofed source address and cause the service to crash.
Install updates from vendor's website.
Red Hat Enterprise Linux EUS Compute Node: 7.3
Red Hat Enterprise Linux for Scientific Computing: 6 - 7
Red Hat Enterprise Linux for IBM z Systems: 6 - 7
Red Hat Enterprise Linux Desktop: 6 - 7
Red Hat Enterprise Linux Workstation: 6 - 7
Red Hat Enterprise Linux Server: 6.0 - 7
External linkshttp://access.redhat.com/errata/RHSA-2017:0252
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Data handling
EUVDB-ID: #VU12302
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7429
CWE-ID:
CWE-19 - Data Handling
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to changing the peer structure to the interface NTP receives the response from a source. A remote attacker can send a response for a source to an interface the source does not use and cause the service to crash.
Install updates from vendor's website.
Red Hat Enterprise Linux EUS Compute Node: 7.3
Red Hat Enterprise Linux for Scientific Computing: 6 - 7
Red Hat Enterprise Linux for IBM z Systems: 6 - 7
Red Hat Enterprise Linux Desktop: 6 - 7
Red Hat Enterprise Linux Workstation: 6 - 7
Red Hat Enterprise Linux Server: 6.0 - 7
External linkshttp://access.redhat.com/errata/RHSA-2017:0252
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Incorrect calcualtion
EUVDB-ID: #VU12304
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7433
CWE-ID:
CWE-682 - Incorrect Calculation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to improper performance of the initial sync calculations. A remote attacker can cause the service to crash via unknown vectors, related to a "root distance that did not include the peer dispersion."
Install updates from vendor's website.
Red Hat Enterprise Linux EUS Compute Node: 7.3
Red Hat Enterprise Linux for Scientific Computing: 6 - 7
Red Hat Enterprise Linux for IBM z Systems: 6 - 7
Red Hat Enterprise Linux Desktop: 6 - 7
Red Hat Enterprise Linux Workstation: 6 - 7
Red Hat Enterprise Linux Server: 6.0 - 7
External linkshttp://access.redhat.com/errata/RHSA-2017:0252
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Improper access control
EUVDB-ID: #VU12305
Risk: Low
CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-9310
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information and cause DoS condition on the target system.
The weakness exists in the control mode (mode 6) functionality in ntpd due to improper access control. A remote attacker can set or unset traps via a specially crafted control mode packet, gain access to potentially sensitive information and cause the service to crash.
Install updates from vendor's website.
Red Hat Enterprise Linux EUS Compute Node: 7.3
Red Hat Enterprise Linux for Scientific Computing: 6 - 7
Red Hat Enterprise Linux for IBM z Systems: 6 - 7
Red Hat Enterprise Linux Desktop: 6 - 7
Red Hat Enterprise Linux Workstation: 6 - 7
Red Hat Enterprise Linux Server: 6.0 - 7
External linkshttp://access.redhat.com/errata/RHSA-2017:0252
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) NULL pointer dereference
EUVDB-ID: #VU12306
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-9311
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in ntpd due to NULL pointer dereference when the trap service is enabled. A remote attacker can submit a specially crafted packet and cause the service to crash.
Install updates from vendor's website.
Red Hat Enterprise Linux EUS Compute Node: 7.3
Red Hat Enterprise Linux for Scientific Computing: 6 - 7
Red Hat Enterprise Linux for IBM z Systems: 6 - 7
Red Hat Enterprise Linux Desktop: 6 - 7
Red Hat Enterprise Linux Workstation: 6 - 7
Red Hat Enterprise Linux Server: 6.0 - 7
External linkshttp://access.redhat.com/errata/RHSA-2017:0252
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
