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Ubuntu 14.10 LTS: USN-2567-1 Critical: NTP Authentication Bypass & DoS

ubuntu
Calendar Grey April 13, 2015
Dist Ubuntu Esm H88
On March 9, 2021, Fedora addressed vulnerabilities in OpenSSL, enhancing protection for users against possible exploits.
Several security issues were fixed in NTP.

Summary

Several security issues were fixed in NTP.

Software Description:

- ntp: Network Time Protocol daemon and utility programs

Details:

Miroslav Lichvar discovered that NTP incorrectly validated MAC fields. A

remote attacker could possibly use this issue to bypass authentication and

spoof packets. (CVE-2015-1798)

Miroslav Lichvar discovered that NTP incorrectly handled certain invalid

packets. A remote attacker could possibly use this issue to cause a denial

of service. (CVE-2015-1799)

Juergen Perlinger discovered that NTP incorrectly generated MD5 keys on

big-endian platforms. This issue could either cause ntp-keygen to hang, or

could result in non-random keys. (CVE number pending)

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu authentication bypass ntp

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.10:
  ntp                             1:4.2.6.p5+dfsg-3ubuntu2.14.10.3

Ubuntu 14.04 LTS:
  ntp                             1:4.2.6.p5+dfsg-3ubuntu2.14.04.3

Ubuntu 12.04 LTS:
  ntp                             1:4.2.6.p3+dfsg-1ubuntu3.4

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2567-1

CVE-2015-1798, CVE-2015-1799

Severity
critical
Lowest
Low
Medium
High
Critical

April 13, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu authentication bypass ntp

Package Information

https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.10.3
https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p5+dfsg-3ubuntu2.14.04.3
https://launchpad.net/ubuntu/+source/ntp/1:4.2.6.p3+dfsg-1ubuntu3.4

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