Описание
Security update for ntp
This update for ntp to 4.2.8p7 fixes the following issues:
- CVE-2016-1547, bsc#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS.
- CVE-2016-1548, bsc#977461: Interleave-pivot
- CVE-2016-1549, bsc#977451: Sybil vulnerability: ephemeral association attack.
- CVE-2016-1550, bsc#977464: Improve NTP security against buffer comparison timing attacks.
- CVE-2016-1551, bsc#977450: Refclock impersonation vulnerability
- CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd.
- CVE-2016-2517, bsc#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated.
- CVE-2016-2518, bsc#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC.
- CVE-2016-2519, bsc#977458: ctl_getitem() return value not always checked.
- This update also improves the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974
Bugs fixed:
- Restrict the parser in the startup script to the first occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226).
Список пакетов
SUSE Linux Enterprise Desktop 12 SP1
SUSE Linux Enterprise Server 12 SP1
SUSE Linux Enterprise Server for SAP Applications 12 SP1
Ссылки
- Link for SUSE-SU-2016:1291-1
- E-Mail link for SUSE-SU-2016:1291-1
- SUSE Security Ratings
- SUSE Bug 957226
- SUSE Bug 977446
- SUSE Bug 977450
- SUSE Bug 977451
- SUSE Bug 977452
- SUSE Bug 977455
- SUSE Bug 977457
- SUSE Bug 977458
- SUSE Bug 977459
- SUSE Bug 977461
- SUSE Bug 977464
- SUSE CVE CVE-2015-7704 page
- SUSE CVE CVE-2015-7705 page
- SUSE CVE CVE-2015-7974 page
- SUSE CVE CVE-2016-1547 page
- SUSE CVE CVE-2016-1548 page
- SUSE CVE CVE-2016-1549 page
Описание
The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted "KOD" messages.
Затронутые продукты
Ссылки
- CVE-2015-7704
- SUSE Bug 1010964
- SUSE Bug 951608
- SUSE Bug 952611
- SUSE Bug 959243
- SUSE Bug 977446
Описание
The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.
Затронутые продукты
Ссылки
- CVE-2015-7705
- SUSE Bug 1010964
- SUSE Bug 951608
- SUSE Bug 952611
- SUSE Bug 959243
Описание
NTP 4.x before 4.2.8p6 and 4.3.x before 4.3.90 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
Затронутые продукты
Ссылки
- CVE-2015-7974
- SUSE Bug 959243
- SUSE Bug 962960
- SUSE Bug 962995
Описание
An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.
Затронутые продукты
Ссылки
- CVE-2016-1547
- SUSE Bug 962784
- SUSE Bug 977446
- SUSE Bug 977459
- SUSE Bug 982064
- SUSE Bug 982065
Описание
An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.
Затронутые продукты
Ссылки
- CVE-2016-1548
- SUSE Bug 959243
- SUSE Bug 977446
- SUSE Bug 977461
- SUSE Bug 982068
Описание
A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.
Затронутые продукты
Ссылки
- CVE-2016-1549
- SUSE Bug 1083424
- SUSE Bug 977446
- SUSE Bug 977451
Описание
An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.
Затронутые продукты
Ссылки
- CVE-2016-1550
- SUSE Bug 977446
- SUSE Bug 977464
Описание
ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.
Затронутые продукты
Ссылки
- CVE-2016-1551
- SUSE Bug 977446
- SUSE Bug 977450
Описание
NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig directive.
Затронутые продукты
Ссылки
- CVE-2016-2516
- SUSE Bug 977446
- SUSE Bug 977452
Описание
NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
Затронутые продукты
Ссылки
- CVE-2016-2517
- SUSE Bug 977446
- SUSE Bug 977455
Описание
The MATCH_ASSOC function in NTP before version 4.2.8p9 and 4.3.x before 4.3.92 allows remote attackers to cause an out-of-bounds reference via an addpeer request with a large hmode value.
Затронутые продукты
Ссылки
- CVE-2016-2518
- SUSE Bug 977446
- SUSE Bug 977457
Описание
ntpd in NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (ntpd abort) by a large request data value, which triggers the ctl_getitem function to return a NULL value.
Затронутые продукты
Ссылки
- CVE-2016-2519
- SUSE Bug 959243
- SUSE Bug 977446
- SUSE Bug 977458