CVE-2016-7431

NTP before 4.2.8p9 allows remote attackers to bypass the origin timestamp protection mechanism via an origin timestamp of zero. NOTE: this vulnerability exists because of a CVE-2015-8138 regression.

These are all security issues fixed in the ntp-4.2.8p9-1.1 package on the GA media of openSUSE Tumbleweed.

This update for ntp fixes the following issues:

• Simplify ntpd's search for its own executable to prevent AppArmor warnings (bsc#956365).

Security issues fixed (update to 4.2.8p9):

• CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6 unauthenticated trap information disclosure and DDoS vector.
• CVE-2016-7427, bsc#1011390: Broadcast Mode Replay Prevention DoS.
• CVE-2016-7428, bsc#1011417: Broadcast Mode Poll Interval Enforcement DoS.
• CVE-2016-7431, bsc#1011395: Regression: 010-origin: Zero Origin Timestamp Bypass.
• CVE-2016-7434, bsc#1011398: Null pointer dereference in _IO_str_init_static_internal().
• CVE-2016-7429, bsc#1011404: Interface selection attack.
• CVE-2016-7426, bsc#1011406: Client rate limiting and server responses.
• CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.
• CVE-2015-5219: An endless loop due to incorrect precision to double conversion (bsc#943216).
• CVE-2015-8140: ntpq vulnerable to replay attacks.
• CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin.
• CVE-2015-5219: An endless loop due to incorrect precision to double conversion (bsc#943216).

Non-security issues fixed:

• Fix a spurious error message.
• Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.
• Fix a regression in 'trap' (bsc#981252).
• Reduce the number of netlink groups to listen on for changes to the local network setup (bsc#992606).
• Fix segfault in 'sntp -a' (bsc#1009434).
• Silence an OpenSSL version warning (bsc#992038).
• Make the resolver task change user and group IDs to the same values as the main task. (bsc#988028)

This update for ntp fixes the following issues:

ntp was updated to 4.2.8p9.

Security issues fixed:

• CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6 unauthenticated trap information disclosure and DDoS vector.
• CVE-2016-7427, bsc#1011390: Broadcast Mode Replay Prevention DoS.
• CVE-2016-7428, bsc#1011417: Broadcast Mode Poll Interval Enforcement DoS.
• CVE-2016-7431, bsc#1011395: Regression: 010-origin: Zero Origin Timestamp Bypass.
• CVE-2016-7434, bsc#1011398: Null pointer dereference in _IO_str_init_static_internal().
• CVE-2016-7429, bsc#1011404: Interface selection attack.
• CVE-2016-7426, bsc#1011406: Client rate limiting and server responses.
• CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.
• CVE-2015-5219: An endless loop due to incorrect precision to double conversion (bsc#943216).

Non-security issues fixed:

• Fix a spurious error message.
• Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.
• Fix a regression in 'trap' (bsc#981252).
• Reduce the number of netlink groups to listen on for changes to the local network setup (bsc#992606).
• Fix segfault in 'sntp -a' (bsc#1009434).
• Silence an OpenSSL version warning (bsc#992038).
• Make the resolver task change user and group IDs to the same values as the main task. (bsc#988028)
• Simplify ntpd's search for its own executable to prevent AppArmor warnings (bsc#956365).

This update for ntp fixes the following issues:

ntp was updated to 4.2.8p9.

Security issues fixed:

• CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6 unauthenticated trap information disclosure and DDoS vector.
• CVE-2016-7427, bsc#1011390: Broadcast Mode Replay Prevention DoS.
• CVE-2016-7428, bsc#1011417: Broadcast Mode Poll Interval Enforcement DoS.
• CVE-2016-7431, bsc#1011395: Regression: 010-origin: Zero Origin Timestamp Bypass.
• CVE-2016-7434, bsc#1011398: Null pointer dereference in _IO_str_init_static_internal().
• CVE-2016-7429, bsc#1011404: Interface selection attack.
• CVE-2016-7426, bsc#1011406: Client rate limiting and server responses.
• CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.
• CVE-2015-5219: An endless loop due to incorrect precision to double conversion (bsc#943216).

Non-security issues fixed:

• Fix a spurious error message.
• Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.
• Fix a regression in 'trap' (bsc#981252).
• Reduce the number of netlink groups to listen on for changes to the local network setup (bsc#992606).
• Fix segfault in 'sntp -a' (bsc#1009434).
• Silence an OpenSSL version warning (bsc#992038).
• Make the resolver task change user and group IDs to the same values as the main task. (bsc#988028)
• Simplify ntpd's search for its own executable to prevent AppArmor warnings (bsc#956365).

This update for ntp fixes the following issues:

ntp was updated to 4.2.8p9.

Security issues fixed:

• CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6 unauthenticated trap information disclosure and DDoS vector.
• CVE-2016-7427, bsc#1011390: Broadcast Mode Replay Prevention DoS.
• CVE-2016-7428, bsc#1011417: Broadcast Mode Poll Interval Enforcement DoS.
• CVE-2016-7431, bsc#1011395: Regression: 010-origin: Zero Origin Timestamp Bypass.
• CVE-2016-7434, bsc#1011398: Null pointer dereference in _IO_str_init_static_internal().
• CVE-2016-7429, bsc#1011404: Interface selection attack.
• CVE-2016-7426, bsc#1011406: Client rate limiting and server responses.
• CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.
• CVE-2015-8140: ntpq vulnerable to replay attacks.
• CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin.
• CVE-2015-5219: An endless loop due to incorrect precision to double conversion (bsc#943216).

Non-security issues fixed:

• Fix a spurious error message.
• Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.
• Fix a regression in 'trap' (bsc#981252).
• Reduce the number of netlink groups to listen on for changes to the local network setup (bsc#992606).
• Fix segfault in 'sntp -a' (bsc#1009434).
• Silence an OpenSSL version warning (bsc#992038).
• Make the resolver task change user and group IDs to the same values as the main task. (bsc#988028)
• Simplify ntpd's search for its own executable to prevent AppArmor warnings (bsc#956365).

Yihan Lian discovered that NTP incorrectly handled certain large request data values. A remote attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-2519)

Miroslav Lichvar discovered that NTP incorrectly handled certain spoofed addresses when performing rate limiting. A remote attacker could possibly use this issue to perform a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-7426)

Matthew Van Gundy discovered that NTP incorrectly handled certain crafted broadcast mode packets. A remote attacker could possibly use this issue to perform a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-7427, CVE-2016-7428)

Miroslav Lichvar discovered that NTP incorrectly handled certain responses. A remote attacker could possibly use this issue to perform a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-7429)

Sharon Goldberg and Aanchal Malhotra discovered that NTP incorrectly handled origin timestamps of zero. A remote attacker could possibly use this issue to bypass the origin timestamp protection mechanism. This issue only affected Ubuntu 16.10. (CVE-2016-7431)

Brian Utterback, Sharon Goldberg and Aanchal Malhotra discovered that NTP incorrectly performed initial sync calculations. This issue only applied to Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7433)

Magnus Stubman discovered that NTP incorrectly handled certain mrulist queries. A remote attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7434)

Matthew Van Gund discovered that NTP incorrectly handled origin timestamp checks. A remote attacker could possibly use this issue to perform a denial of service. This issue only affected Ubuntu Ubuntu 16.10, and Ubuntu 17.04. (CVE-2016-9042)

Matthew Van Gundy discovered that NTP incorrectly handled certain control mode packets. A remote attacker could use this issue to set or unset traps. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-9310)

Matthew Van Gundy discovered that NTP incorrectly handled the trap service. A remote attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-9311)

It was discovered that NTP incorrectly handled memory when processing long variables. A remote authenticated user could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2017-6458)

It was discovered that NTP incorrectly handled memory when processing long variables. A remote authenticated user could possibly use this issue to cause NTP to crash, resulting in a denial of service. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-6460)

It was discovered that the NTP legacy DPTS refclock driver incorrectly handled the /dev/datum device. A local attacker could possibly use this issue to cause a denial of service. (CVE-2017-6462)

It was discovered that NTP incorrectly handled certain invalid settings in a :config directive. A remote authenticated user could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2017-6463)

It was discovered that NTP incorrectly handled certain invalid mode configuration directives. A remote authenticated user could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2017-6464)