CVE-2017-6458

Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.

A vulnerability was found in NTP, in the legacy MX4200 refclock implementation. If this refclock was compiled in and used, an attacker may be able to induce stack overflow, leading to a crash or potential code execution (CVE-2017-6451).

A vulnerability was found in NTP, in the building of response packets with custom fields. If custom fields were configured in ntp.conf with particularly long names, inclusion of these fields in the response packet could cause a buffer overflow, leading to a crash (CVE-2017-6458).

A vulnerability was found in NTP, in the parsing of packets from the /dev/datum device. A malicious device could send crafted messages, causing ntpd to crash (CVE-2017-6462).

A vulnerability was discovered in the NTP server's parsing of configuration directives. A remote, authenticated attacker could cause ntpd to crash by sending a crafted message (CVE-2017-6463).

A vulnerability was discovered in the NTP server's parsing of configuration directives. A remote, authenticated attacker could cause ntpd to crash by sending a crafted message (CVE-2017-6464).

These are all security issues fixed in the ntp-4.2.8p15-7.2 package on the GA media of openSUSE Tumbleweed.

This ntp update to version 4.2.8p10 fixes serveral issues.

This updated enables leap smearing. See /usr/share/doc/packages/ntp/README.leapsmear for details.

Security issues fixed (bsc#1030050):

• CVE-2017-6464: Denial of Service via Malformed Config
• CVE-2017-6462: Buffer Overflow in DPTS Clock
• CVE-2017-6463: Authenticated DoS via Malicious Config Option
• CVE-2017-6458: Potential Overflows in ctl_put() functions
• CVE-2017-6451: Improper use of snprintf() in mx4200_send()
• CVE-2017-6460: Buffer Overflow in ntpq when fetching reslist
• CVE-2016-9042: 0rigin (zero origin) DoS.
• ntpq_stripquotes() returns incorrect Value
• ereallocarray()/eallocarray() underused
• Copious amounts of Unused Code
• Off-by-one in Oncore GPS Receiver
• Makefile does not enforce Security Flags

Bugfixes:

• Remove spurious log messages (bsc#1014172).
• clang scan-build findings
• Support for openssl-1.1.0 without compatibility modes
• Bugfix 3072 breaks multicastclient
• forking async worker: interrupted pipe I/O
• (...) time_pps_create: Exec format error
• Incorrect Logic for Peer Event Limiting
• Change the process name of forked DNS worker
• Trap Configuration Fail
• Nothing happens if minsane < maxclock < minclock
• allow -4/-6 on restrict line with mask
• out-of-bound pointers in ctl_putsys and decode_bitflags
• Move ntp-kod to /var/lib/ntp, because /var/db is not a standard directory and causes problems for transactional updates.

This ntp update to version 4.2.8p10 fixes serveral issues.

This updated enables leap smearing. See /usr/share/doc/packages/ntp/README.leapsmear for details.

Security issues fixed (bsc#1030050):

• CVE-2017-6464: Denial of Service via Malformed Config
• CVE-2017-6462: Buffer Overflow in DPTS Clock
• CVE-2017-6463: Authenticated DoS via Malicious Config Option
• CVE-2017-6458: Potential Overflows in ctl_put() functions
• CVE-2017-6451: Improper use of snprintf() in mx4200_send()
• CVE-2017-6460: Buffer Overflow in ntpq when fetching reslist
• CVE-2016-9042: 0rigin (zero origin) DoS.
• ntpq_stripquotes() returns incorrect Value
• ereallocarray()/eallocarray() underused
• Copious amounts of Unused Code
• Off-by-one in Oncore GPS Receiver
• Makefile does not enforce Security Flags

Bugfixes:

• Remove spurious log messages (bsc#1014172).
• clang scan-build findings
• Support for openssl-1.1.0 without compatibility modes
• Bugfix 3072 breaks multicastclient
• forking async worker: interrupted pipe I/O
• (...) time_pps_create: Exec format error
• Incorrect Logic for Peer Event Limiting
• Change the process name of forked DNS worker
• Trap Configuration Fail
• Nothing happens if minsane < maxclock < minclock
• allow -4/-6 on restrict line with mask
• out-of-bound pointers in ctl_putsys and decode_bitflags
• Move ntp-kod to /var/lib/ntp, because /var/db is not a standard directory and causes problems for transactional updates.

This ntp update to version 4.2.8p10 fixes the following issues:

Security issues fixed (bsc#1030050):

• CVE-2017-6464: Denial of Service via Malformed Config
• CVE-2017-6462: Buffer Overflow in DPTS Clock
• CVE-2017-6463: Authenticated DoS via Malicious Config Option
• CVE-2017-6458: Potential Overflows in ctl_put() functions
• CVE-2017-6451: Improper use of snprintf() in mx4200_send()
• CVE-2017-6460: Buffer Overflow in ntpq when fetching reslist
• CVE-2016-9042: 0rigin (zero origin) DoS.
• ntpq_stripquotes() returns incorrect Value
• ereallocarray()/eallocarray() underused
• Copious amounts of Unused Code
• Off-by-one in Oncore GPS Receiver
• Makefile does not enforce Security Flags

Bugfixes:

• Remove spurious log messages (bsc#1014172).
• Fixing ppc and ppc64 linker issue (bsc#1031085).
• clang scan-build findings
• Support for openssl-1.1.0 without compatibility modes
• Bugfix 3072 breaks multicastclient
• forking async worker: interrupted pipe I/O
• (...) time_pps_create: Exec format error
• Incorrect Logic for Peer Event Limiting
• Change the process name of forked DNS worker
• Trap Configuration Fail
• Nothing happens if minsane < maxclock < minclock
• allow -4/-6 on restrict line with mask
• out-of-bound pointers in ctl_putsys and decode_bitflags
• Move ntp-kod to /var/lib/ntp, because /var/db is not a standard directory and causes problems for transactional updates.

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)