This update fixes a denial of service issue if autokey is enabled (default is disabled) and a crash in ntpq.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source.

A buffer overflow flaw was discovered in the ntpd daemon's NTPv4 authentication code. If ntpd was configured to use public key cryptography for NTP packet authentication, a remote attacker could use this flaw to send a specially crafted request packet that could crash ntpd. (CVE-2009-1252)

Note: NTP authentication is not enabled by default.

A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially crafted reply to an ntpq request that could crash ntpq. (CVE-2009-0159)

All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will be restarted automatically.

This update fixes a remote buffer overflow in xntp/ntp which can be exploited when autokey is enabled to execute arbitrary code.
(CVE-2009-1252) This upfate fixes a buffer overflow in ntpd that can be triggered by a malicious server. (CVE-2009-0159)

The remote OracleVM system is missing necessary patches to address critical security updates :

CVE-2009-0159 Stack-based buffer overflow in the cookedprint function in ntpq/ntpq.c in ntpq in NTP before 4.2.4p7-RC2 allows remote NTP servers to execute arbitrary code via a crafted response.

CVE-2009-1252 Stack-based buffer overflow in the crypto_recv function in ntp_crypto.c in ntpd in NTP before 4.2.4p7 and 4.2.5 before 4.2.5p74, when OpenSSL and autokey are enabled, allows remote attackers to execute arbitrary code via a crafted packet containing an extension field.

CVE-2009-0021 NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.

  - fix buffer overflow when parsing Autokey association     message (#500783, CVE-2009-1252)

  - fix buffer overflow in ntpq (#500783, CVE-2009-0159)

  - fix check for malformed signatures (#479698,     CVE-2009-0021)

  - fix selecting multicast interface (#444106)

  - disable kernel discipline when -x option is used     (#431729)

  - avoid use of uninitialized floating-point values in     clock_select (#250838)

  - generate man pages from html source, include config man     pages (#307271)

  - add note about paths and exit codes to ntpd man page     (#242925, #246568)

  - add section about exit codes to ntpd man page (#319591)

  - always return 0 in scriptlets

  - pass additional options to ntpdate (#240141)

  - fix broadcast client to accept broadcasts on     255.255.255.255 (#226958)

  - compile with crypto support on 64bit architectures     (#239580)

  - add ncurses-devel to buildrequires (#239580)

  - exit with nonzero code if ntpd -q did not set clock     (#240134)

  - fix return codes in init script (#240118)

The remote OracleVM system is missing necessary patches to address critical security updates :

  - Remove default ntp servers in ntp.conf [bug 14342986]

  - don't generate weak control key for resolver     (CVE-2014-9293)

  - don't generate weak MD5 keys in ntp-keygen     (CVE-2014-9294)

  - fix buffer overflows via specially-crafted packets     (CVE-2014-9295)

  - increase memlock limit again (#1035198)

  - allow selection of cipher for private key files     (#741573)

  - revert init script priority (#470945, #689636)

  - drop tentative patch (#489835)

  - move restorecon call to %posttrans

  - call restorecon on ntpd and ntpdate on start (#470945)

  - don't crash with more than 512 local addresses (#661934)

  - add -I option (#528799)

  - fix -L option to not require argument (#460434)

  - move ntpd and ntpdate to /sbin and start earlier on boot     (#470945, #689636)

  - increase memlock limit (#575874)

  - ignore tentative addresses (#489835)

  - print synchronization distance instead of dispersion in     ntpstat (#679034)

  - fix typos in ntpq and ntp-keygen man pages (#664524,     #664525)

  - clarify ntpd -q description (#591838)

  - don't verify ntp.conf (#481151)

  - replace Prereq tag

  - fix DoS with mode 7 packets (#532640, CVE-2009-3563)

  - compile with -fno-strict-aliasing

  - fix buffer overflow when parsing Autokey association     message (#500784, CVE-2009-1252)

  - fix buffer overflow in ntpq (#500784, CVE-2009-0159)

  - fix check for malformed signatures (#479699,     CVE-2009-0021)

The remote OracleVM system is missing necessary patches to address critical security updates :

  - don't generate weak control key for resolver     (CVE-2014-9293)

  - don't generate weak MD5 keys in ntp-keygen     (CVE-2014-9294)

  - fix buffer overflows via specially-crafted packets     (CVE-2014-9295)

  - increase memlock limit again (#1035198)

  - allow selection of cipher for private key files     (#741573)

  - revert init script priority (#470945, #689636)

  - drop tentative patch (#489835)

  - move restorecon call to %posttrans

  - call restorecon on ntpd and ntpdate on start (#470945)

  - don't crash with more than 512 local addresses (#661934)

  - add -I option (#528799)

  - fix -L option to not require argument (#460434)

  - move ntpd and ntpdate to /sbin and start earlier on boot     (#470945, #689636)

  - increase memlock limit (#575874)

  - ignore tentative addresses (#489835)

  - print synchronization distance instead of dispersion in     ntpstat (#679034)

  - fix typos in ntpq and ntp-keygen man pages (#664524,     #664525)

  - clarify ntpd -q description (#591838)

  - don't verify ntp.conf (#481151)

  - replace Prereq tag

  - fix DoS with mode 7 packets (#532640, CVE-2009-3563)

  - compile with -fno-strict-aliasing

  - fix buffer overflow when parsing Autokey association     message (#500784, CVE-2009-1252)

  - fix buffer overflow in ntpq (#500784, CVE-2009-0159)

  - fix check for malformed signatures (#479699,     CVE-2009-0021)

An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 4.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source.

A buffer overflow flaw was discovered in the ntpd daemon's NTPv4 authentication code. If ntpd was configured to use public key cryptography for NTP packet authentication, a remote attacker could use this flaw to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the 'ntp' user. (CVE-2009-1252)

Note: NTP authentication is not enabled by default.

A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially crafted reply to an ntpq request that could crash ntpq or, potentially, execute arbitrary code with the privileges of the user running the ntpq command.
(CVE-2009-0159)

All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will be restarted automatically.

A buffer overflow flaw was discovered in the ntpd daemon's NTPv4 authentication code. If ntpd was configured to use public key cryptography for NTP packet authentication, a remote attacker could use this flaw to send a specially crafted request packet that could crash ntpd. (CVE-2009-1252)

Note: NTP authentication is not enabled by default.

A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially crafted reply to an ntpq request that could crash ntpq. (CVE-2009-0159)

After installing the update, the ntpd daemon will be restarted automatically.

a. JRE Security Update

  JRE update to version 1.5.0_20, which addresses multiple security   issues that existed in earlier releases of JRE.

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has   assigned the following names to the security issues fixed in   JRE 1.5.0_18: CVE-2009-1093, CVE-2009-1094, CVE-2009-1095,   CVE-2009-1096, CVE-2009-1097, CVE-2009-1098, CVE-2009-1099,   CVE-2009-1100, CVE-2009-1101, CVE-2009-1102, CVE-2009-1103,   CVE-2009-1104, CVE-2009-1105, CVE-2009-1106, and CVE-2009-1107.

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has   assigned the following names to the security issues fixed in   JRE 1.5.0_20: CVE-2009-2625, CVE-2009-2670, CVE-2009-2671,   CVE-2009-2672, CVE-2009-2673, CVE-2009-2675, CVE-2009-2676,   CVE-2009-2716, CVE-2009-2718, CVE-2009-2719, CVE-2009-2720,   CVE-2009-2721, CVE-2009-2722, CVE-2009-2723, CVE-2009-2724.

b. Update Apache Tomcat version

  Update for VirtualCenter and ESX patch update the Tomcat package to   version 6.0.20 (vSphere 4.0) or version 5.5.28 (VirtualCenter 2.5)   which addresses multiple security issues that existed   in the previous version of Apache Tomcat.

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has   assigned the following names to the security issues fixed in   Apache Tomcat 6.0.20 and Tomcat 5.5.28: CVE-2008-5515,   CVE-2009-0033, CVE-2009-0580, CVE-2009-0781, CVE-2009-0783.

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has   assigned the following names to the security issues fixed in   Apache Tomcat 6.0.18:  CVE-2008-1232, CVE-2008-1947, CVE-2008-2370.

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has   assigned the following names to the security issues fixed in   Apache Tomcat 6.0.16:  CVE-2007-5333, CVE-2007-5342, CVE-2007-5461,   CVE-2007-6286, CVE-2008-0002.
  c. Third-party library update for ntp.
   The Network Time Protocol (NTP) is used to synchronize a computer's   time with a referenced time source.
   ESXi 3.5 and ESXi 4.0 have a ntp client that is affected by the   following security issue. Note that the same security issue is   present in the ESX Service Console as described in section d. of   this advisory.
   A buffer overflow flaw was discovered in the ntpd daemon's NTPv4   authentication code. If ntpd was configured to use public key   cryptography for NTP packet authentication, a remote attacker could   use this flaw to send a specially crafted request packet that could   crash ntpd or, potentially, execute arbitrary code with the   privileges of the 'ntp' user.
   The Common Vulnerabilities and Exposures Project (cve.mitre.org)   has assigned the name CVE-2009-1252 to this issue.
   The NTP security issue identified by CVE-2009-0159 is not relevant   for ESXi 3.5 and ESXi 4.0.
 d. Service Console update for ntp

  Service Console package ntp updated to version ntp-4.2.2pl-9el5_3.2    The Network Time Protocol (NTP) is used to synchronize a computer's   time with a referenced time source.
   The Service Console present in ESX is affected by the following   security issues.
   A buffer overflow flaw was discovered in the ntpd daemon's NTPv4   authentication code. If ntpd was configured to use public key   cryptography for NTP packet authentication, a remote attacker could   use this flaw to send a specially crafted request packet that could   crash ntpd or, potentially, execute arbitrary code with the   privileges of the 'ntp' user.
   NTP authentication is not enabled by default on the Service Console.
   The Common Vulnerabilities and Exposures Project (cve.mitre.org)   has assigned the name CVE-2009-1252 to this issue.
   A buffer overflow flaw was found in the ntpq diagnostic command. A   malicious, remote server could send a specially crafted reply to an   ntpq request that could crash ntpq or, potentially, execute   arbitrary code with the privileges of the user running the ntpq   command.
   The Common Vulnerabilities and Exposures Project (cve.mitre.org)   has assigned the name CVE-2009-0159 to this issue.
  e. Updated Service Console package kernel

  Updated Service Console package kernel addresses the security   issues listed below.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2008-3528, CVE-2008-5700, CVE-2009-0028,   CVE-2009-0269, CVE-2009-0322, CVE-2009-0675, CVE-2009-0676,   CVE-2009-0778 to the security issues fixed in kernel   2.6.18-128.1.6.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2008-4307, CVE-2009-0834, CVE-2009-1337,   CVE-2009-0787, CVE-2009-1336 to the security issues fixed in   kernel 2.6.18-128.1.10.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2009-1439, CVE-2009-1633, CVE-2009-1072,   CVE-2009-1630, CVE-2009-1192 to the security issues fixed in   kernel 2.6.18-128.1.14.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2007-5966, CVE-2009-1385, CVE-2009-1388,   CVE-2009-1389, CVE-2009-1895, CVE-2009-2406, CVE-2009-2407 to the   security issues fixed in kernel 2.6.18-128.4.1.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2009-2692, CVE-2009-2698 to the   security issues fixed in kernel 2.6.18-128.7.1.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2009-0745, CVE-2009-0746, CVE-2009-0747,   CVE-2009-0748, CVE-2009-2847, CVE-2009-2848 to the security issues   fixed in kernel 2.6.18-164.

 f. Updated Service Console package python

  Service Console package Python update to version 2.4.3-24.el5.

  When the assert() system call was disabled, an input sanitization   flaw was revealed in the Python string object implementation that   led to a buffer overflow. The missing check for negative size values   meant the Python memory allocator could allocate less memory than   expected. This could result in arbitrary code execution with the   Python interpreter's privileges.

  Multiple buffer and integer overflow flaws were found in the Python   Unicode string processing and in the Python Unicode and string   object implementations. An attacker could use these flaws to cause   a denial of service.

  Multiple integer overflow flaws were found in the Python imageop   module. If a Python application used the imageop module to   process untrusted images, it could cause the application to   disclose sensitive information, crash or, potentially, execute   arbitrary code with the Python interpreter's privileges.

  Multiple integer underflow and overflow flaws were found in the   Python snprintf() wrapper implementation. An attacker could use   these flaws to cause a denial of service (memory corruption).

  Multiple integer overflow flaws were found in various Python   modules. An attacker could use these flaws to cause a denial of   service.

  An integer signedness error, leading to a buffer overflow, was   found in the Python zlib extension module. If a Python application   requested the negative byte count be flushed for a decompression   stream, it could cause the application to crash or, potentially,   execute arbitrary code with the Python interpreter's privileges.

  A flaw was discovered in the strxfrm() function of the Python   locale module. Strings generated by this function were not properly   NULL-terminated, which could possibly cause disclosure of data   stored in the memory of a Python application using this function.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2007-2052 CVE-2007-4965 CVE-2008-1721   CVE-2008-1887 CVE-2008-2315 CVE-2008-3142 CVE-2008-3143   CVE-2008-3144 CVE-2008-4864 CVE-2008-5031 to these issues.

 g. Updated Service Console package bind

  Service Console package bind updated to version 9.3.6-4.P1.el5

  The Berkeley Internet Name Domain (BIND) is an implementation of the   Domain Name System (DNS) protocols. BIND includes a DNS server   (named); a resolver library (routines for applications to use when   interfacing with DNS); and tools for verifying that the DNS server   is operating correctly.

  A flaw was found in the way BIND handles dynamic update message   packets containing the 'ANY' record type. A remote attacker could   use this flaw to send a specially crafted dynamic update packet   that could cause named to exit with an assertion failure.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the name CVE-2009-0696 to this issue.

 h. Updated Service Console package libxml2

  Service Console package libxml2 updated to version 2.6.26-2.1.2.8.

  libxml is a library for parsing and manipulating XML files. A   Document Type Definition (DTD) defines the legal syntax (and also   which elements can be used) for certain types of files, such as XML   files.

  A stack overflow flaw was found in the way libxml processes the   root XML document element definition in a DTD. A remote attacker   could provide a specially crafted XML file, which once opened by a   local, unsuspecting user, would lead to denial of service.

  Multiple use-after-free flaws were found in the way libxml parses   the Notation and Enumeration attribute types. A remote attacker   could provide a specially crafted XML file, which once opened by a   local, unsuspecting user, would lead to denial of service.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2009-2414 and CVE-2009-2416 to these   issues.

 i. Updated Service Console package curl

  Service Console package curl updated to version 7.15.5-2.1.el5_3.5

  A cURL is affected by the previously published 'null prefix attack',   caused by incorrect handling of NULL characters in X.509   certificates. If an attacker is able to get a carefully-crafted   certificate signed by a trusted Certificate Authority, the attacker   could use the certificate during a man-in-the-middle attack and   potentially confuse cURL into accepting it by mistake.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the name CVE-2009-2417 to this issue

 j. Updated Service Console package gnutls

  Service Console package gnutil updated to version 1.4.1-3.el5_3.5

  A flaw was discovered in the way GnuTLS handles NULL characters in   certain fields of X.509 certificates. If an attacker is able to get   a carefully-crafted certificate signed by a Certificate Authority   trusted by an application using GnuTLS, the attacker could use the   certificate during a man-in-the-middle attack and potentially   confuse the application into accepting it by mistake.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the name CVE-2009-2730 to this issue

A stack-based buffer overflow was discovered in ntpq. If a user were tricked into connecting to a malicious ntp server, a remote attacker could cause a denial of service in ntpq, or possibly execute arbitrary code with the privileges of the user invoking the program.
(CVE-2009-0159)

Chris Ries discovered a stack-based overflow in ntp. If ntp was configured to use autokey, a remote attacker could send a crafted packet to cause a denial of service, or possibly execute arbitrary code. (CVE-2009-1252).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名稱	產品	系列	已發布	已更新	嚴重性
38962	Fedora 9 : ntp-4.2.4p7-1.fc9 (2009-5275)	Nessus	Fedora Local Security Checks	2009/6/1	2021/1/11	medium
43750	CentOS 5 : ntp (CESA-2009:1039)	Nessus	CentOS Local Security Checks	2010/1/6	2021/1/4	medium
40285	openSUSE Security Update : ntp (ntp-862)	Nessus	SuSE Local Security Checks	2009/7/21	2021/1/14	medium
79458	OracleVM 2.1 : ntp (OVMSA-2009-0011)	Nessus	OracleVM Local Security Checks	2014/11/26	2021/1/14	medium
80394	OracleVM 3.2 : ntp (OVMSA-2015-0001)	Nessus	OracleVM Local Security Checks	2015/1/7	2021/1/4	high
80395	OracleVM 2.2 : ntp (OVMSA-2015-0002)	Nessus	OracleVM Local Security Checks	2015/1/7	2021/1/4	high
67066	CentOS 4 : ntp (CESA-2009:1040)	Nessus	CentOS Local Security Checks	2013/6/29	2021/1/4	medium
60587	Scientific Linux Security Update : ntp on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	medium
38820	RHEL 5 : ntp (RHSA-2009:1039)	Nessus	Red Hat Local Security Checks	2009/5/19	2021/1/14	medium
38821	RHEL 4 : ntp (RHSA-2009:1040)	Nessus	Red Hat Local Security Checks	2009/5/19	2021/1/14	medium
38961	Fedora 10 : ntp-4.2.4p7-1.fc10 (2009-5273)	Nessus	Fedora Local Security Checks	2009/6/1	2021/1/11	medium
42870	VMSA-2009-0016 : VMware vCenter and ESX update release and vMA patch release address multiple security issues in third party components.	Nessus	VMware ESX Local Security Checks	2009/11/23	2021/1/6	medium
38848	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 : ntp vulnerabilities (USN-777-1)	Nessus	Ubuntu Local Security Checks	2009/5/20	2021/1/19	medium
41601	SuSE 10 Security Update : xntp (ZYPP Patch Number 6232)	Nessus	SuSE Local Security Checks	2009/9/24	2021/1/14	medium
41441	SuSE 11 Security Update : ntp (SAT Patch Number 863)	Nessus	SuSE Local Security Checks	2009/9/24	2021/1/14	medium

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