|发布时间 :2005-05-02 00:00:00|
|修订时间 :2011-03-07 21:21:13|
[原文]Unknown vulnerability in HP-UX B.11.00, B.11.04, B.11.11, B.11.22, and B.11.23, when running TCP/IP on IPv4, allows remote attackers to cause a denial of service via certain packets, related to the PMTU, a different vulnerability than CVE-2004-1060.
[CNNVD]HP-UX ICMP PMTUD远程拒绝服务漏洞(CNNVD-200505-120)
- CVSS (基础分值)
- CPE (受影响的平台与产品)
|cpe:/o:hp:hp-ux:11.22||HP-UX 11i v1.6|
|cpe:/o:hp:hp-ux:11.04||HP HP-UX 11.04|
|cpe:/o:hp:hp-ux:11.23||HP-UX 11i v2|
- OVAL (用于检测的技术细节)
|oval:org.mitre.oval:def:935||HP-UX PMTUD Remote DoS (B.11.23)|
|oval:org.mitre.oval:def:1607||HP-UX PMTUD Remote DoS (B.11.11)|
|oval:org.mitre.oval:def:1552||HP-UX PMTUD Remote DoS (B.11.22)|
|oval:org.mitre.oval:def:1533||HP-UX PMTUD Remote DoS (B.11.11-IPSEC)|
|oval:org.mitre.oval:def:1407||HP-UX PMTUD Remote DoS (B.11.23-IPSEC)|
(UNKNOWN) HP SSRT5954
(UNKNOWN) HP HPSBUX01137
(UNKNOWN) BID 13367
(UNKNOWN) SREASON 262
|HP-UX ICMP PMTUD远程拒绝服务漏洞|
|2005-05-02 00:00:00||2005-10-25 00:00:00|
- 漏洞信息 (F38778)
|advisory,denial of service,tcp|
HP Security Bulletin - A potential security vulnerability has been identified with HP-UX running TCP/IP (IPv4). This vulnerability could be remotely exploited by an unauthorized user to cause a Denial of Service (DoS).
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HP SECURITY BULLETIN HPSBUX01137 REVISION: 4 SSRT5954 rev.4 - HP-UX TCP/IP Remote Denial of Service (DoS) NOTICE: There are no restrictions for distribution of this Security Bulletin provided that it remains complete and intact. The information in this Security Bulletin should be acted upon as soon as possible. INITIAL RELEASE: 10 July 2005 POTENTIAL SECURITY IMPACT: Remote Denial of Service (DoS) SOURCE: Hewlett-Packard Company HP Software Security Response Team VULNERABILITY SUMMARY: A potential security vulnerability has been identified with HP-UX running TCP/IP (IPv4). This vulnerability could be remotely exploited by an unauthorized user to cause a Denial of Service (DoS). REFERENCES: CAN-2005-1192 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP-UX B.11.11, B.11.22, B.11.23. BACKGROUND: AFFECTED VERSIONS Note: To determine if a system has an affected version, search the output of "swlist -a revision -l fileset" for an affected fileset. Then determine if the recommended patch or update is installed. HP-UX B.11.22 ============= Networking.NET2-KRN action: install preliminary binary files per HPSBUX01164 OR set ip_pmtu_strategy=0 or 3 HP-UX B.11.11 ============= Networking.NET2-KRN action: install PHNE_33159 OR set ip_pmtu_strategy=0 or 3 HP-UX B.11.23 ============= Networking.NET2-KRN ->action: install PHNE_32606 OR set ip_pmtu_strategy=0 or 3 HP-UX B.11.23 HP-UX B.11.11 ============= IPSec.IPSEC2-KRN action: set ip_pmtu_strategy=0 or 3 END AFFECTED VERSIONS ->Note: Setting ip_pmtu_strategy=0 is preferred. Please refer to HPSBUX01164 for more information. Certain network traffic can result in a Denial of Service (DoS) for HP-UX systems running TCP/IP (IPv4). Receiving a certain packet on any open TCP/IP connection can result in a Denial of Service (DoS) condition which can only be corrected by a reboot of the affected system. ->The Denial of Service (DoS) is characterized by high cpu utilization and a lack of response on any I/O port including the system console. Until patches are available to resolve the issue the Denial of Service (DoS) can be avoided by setting the ip_pmtu_strategy parameter to either 0 or 3. Discussion of ip_pmtu_strategy ---------------------------------- The default value for ip_pmtu_strategy is 1. This allows for PMTU discovery. Once the issue of this Security Bulletin has been resolved via patches the ip_pmtu_strategy value of 1 will again be the preferred setting for most situations. The ip_pmtu_strategy values of 0 and 3 set the PMTU to a fixed size for destinations which are not on the local network. The ip_pmtu_strategy value of 0 sets the PMTU to 576 bytes. Routers are required to handle packets of at least this size. The ip_pmtu_strategy value of 3 sets the PMTU to 1500 bytes. This will generally result in more efficient transmission than the 576 byte PMTU. If it is known that the routers involved can handle a 1500 byte MTU the ip_pmtu_strategy value of 3 is preferred. Patch requirements for setting ip_pmtu_strategy to 3 ---------------------------------------------------------- All affected HP-UX versions allow setting ip_pmtu_strategy to 0. B.11.22 and B.11.23 have no patch requirements for setting ip_pmtu_strategy to 3. ->B.11.11 requires PHNE_25642 or subsequent in order to set ip_pmtu_strategy to 3. Reboot requirement for setting ip_pmtu_strategy ------------------------------------------------------ ->Any existing connection presents the potential for a Denial of Service (DoS). Because of this it is recommended that the /etc/rc.config.d/nddconf be modified as discussed below and the system be rebooted. Note: It has been recommended in several places including HP-UX Bastille, System Health Check, and the Security Bulletin HPSBUX0001-110 that ip_pmtu_strategy be set to 1. This recommendation was made to avoid issues with which occurred when ip_pmtu_strategy was set to 2. The value 1 was recommended because it is the system default and for most situations results in the best performance. However, the values 0 and 3 also avoid the issues which occurred when ip_pmtu_strategy was set to 2. As mentioned above once the issue of this Security Bulletin has been resolved via patches the ip_pmtu_strategy setting of 1 will again be the preferred setting for most situations. Note: There is a defect that will cause "ndd -c" to fail if there are more than 10 directives in /etc/rc.config.d/nddconf. That defect is fixed in the following patch: B.11.11 - PHNE_25644 or subsequent RESOLUTION: Until patches are available the Denial of Service (DoS) can be avoided by setting the ip_pmtu_strategy parameter to 0 or 3. ->Note: The preliminary binary files cited in HPSBUX01164 will resolve the issue of this Security Bulletin as well for the core TCP/IP product. If the IPSec product is installed in B11.11 or B.11.23 it will still be necessary to work around the issue of this Security Bulletin by setting ip_pmtu_strategy=0 or 3. If the ip_pmtu_strategy value of 3 is desired for B.11.11 apply the patch listed in the Background section. Edit /etc/rc.config.d/nddconf to add the following: TRANSPORT_NAME[n]=ip NDD_NAME[n]=ip_pmtu_strategy NDD_VALUE[n]=0 or TRANSPORT_NAME[n]=ip NDD_NAME[n]=ip_pmtu_strategy NDD_VALUE[n]=3 where 'n' is the next available index value as described in the nddconf comments. This value will take effect when the system is rebooted. Until the system can be rebooted use the following command to read the /etc/rc.config.d/nddconf file and set the tunable parameters: /usr/bin/ndd -c The ip_pmtu_strategy parameter can be displayed by the following command: /usr/bin/ndd -get /dev/ip ip_pmtu_strategy ->Note: Since open connections will remain potentially vulnerable until they are closed and certain internal data structures are released it is recommended that the system be rebooted. MANUAL ACTIONS: Yes - NonUpdate B.11.11, B.11.22, B.11.23 set ip_pmtu_strategy = 0 or 3 ->The binary files and patches cited in the HPSBUX01164 Security Bulletin will resolve the issue of this Security Bulletin as well for the core TCP/IP product. ->B11.11, B.11.23 running IPSec ->set ip_pmtu_strategy = 0 or 3 ->The binary files and patches cited in the HPSBUX01164 Security Bulletin will NOT resolve the issue of this Security Bulletin in the case of the IPSec product. BULLETIN REVISION HISTORY: Revision 0: 24 April 2005 Initial release Revision 1: 25 May 2005 The binary files of HPSBUX01164 will resolve the issue for B.11.11 and B.11.23. Revision 2: 1 June 2005 The binary files of HPSBUX01164 will resolve the issue for the core TCP/IP in B.11.11, B.11.22, and B.11.23. The binary files of HPSBUX01164 will resolve NOT resolve the issue for IPSec. B.11.00 and B.11.04 are NOT vulnerable. The recommended workaround is to modify /etc/rc.config.d/nddconf and reboot. Revision 3: 27 June 2005 PHNE_33159 is available for B.11.11. Revision 4: 10 July 2005 PHNE_32606 is available for B.11.23. HP-UX SPECIFIC SECURITY BULLETINS*: Security Patch Check revision B.02.00 analyzes all HP-issued Security Bulletins to provide a subset of recommended actions that potentially affect a specific HP-UX system. For more information: http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/ displayProductInfo.pl?productNumber=B6834AA SUPPORT: For further information, contact normal HP Services support channel. REPORT: To report a potential security vulnerability with any HP supported product, send Email to: email@example.com. It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information. To obtain the security-alert PGP key please send an e-mail message to firstname.lastname@example.org with the Subject of 'get key' (no quotes). SUBSCRIBE: To initiate a subscription to receive future HP Security Bulletins via Email: http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA& langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC On the web page: ITRC security bulletins and patch sign-up Under Step1: your IRTC security bulletins and patches - check ALL categories for which alerts are required and continue. Under Step2: your IRTC operating systems - verify your operating system selections are checked and save. To update an existing subscription: http://h30046.www3.hp.com/subSignIn.php Log in on the web page Subscriber's choice for Business: sign-in. On the Web page: Subscriber's Choice: your profile summary - use Edit Profile to update appropriate sections. To review previously published Security Bulletins visit: http://itrc.hp.com/service/cki/secBullArchive.do * The Software Product Category that this Security Bulletin relates to is represented by the 5th and 6th characters of the Bulletin number: GN = HP General SW, MA = HP Management Agents, MI = Misc. 3rd party SW, MP = HP MPE/iX, NS = HP NonStop Servers, OV = HP OpenVMS, PI = HP Printing & Imaging, ST = HP Storage SW, TL = HP Trusted Linux, TU = HP Tru64 UNIX, UX = HP-UX, VV = HP Virtual Vault System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." (c)Copyright 2005 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP nor its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. -----BEGIN PGP SIGNATURE----- Version: PGP 8.1 iQA/AwUBQtJUxuAfOvwtKn1ZEQKQuQCg9p2Nyc6ddPj6pg96wJvtzz2MR/gAni0Q tjFlFgd8TIiu+b279LF2OAH9 =7y46 -----END PGP SIGNATURE-----
|Multiple Vendor TCP/IP PMTU Unspecified DoS|
|Remote / Network Access||Denial of Service|
|Loss of Availability|
|HP-UX contains a flaw that may allow a remote denial of service. The issue is caused by an unspecified error in the PMTU discovery processing when receiving a specially crafted packet on any open connection, and will result in loss of availability for the platform. No further details have been provided.|
|Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround: Set the "ip_pmtu_strategy" parameter to 0 or 3.|
|Unknown or Incomplete|
|HP-UX ICMP PMTUD Remote Denial Of Service Vulnerability|
|Failure to Handle Exceptional Conditions||13367|
|2005-04-25 12:00:00||2007-11-15 12:37:00|
|This issue was discovered by Fernando Gont.|
|HP HP-UX B.11.23
HP HP-UX B.11.22
HP HP-UX B.11.11
HP HP-UX B.11.04
HP HP-UX B.11.00
Avaya Predictive Dialing System (PDS) 12.0
|Path MTU Discovery (PMTUD) functionality is supported within the ICMP protocol.
An attack against ICMP PMTUD is reported to affect HP-UX IPV4-based platforms. By sending a suitable forged ICMP message to a target host (Type 3, code 4 Fragmentation needed and DF bit set for IPV4 networks), an attacker may reduce the MTU for a given connection.
A remote attacker may exploit this issue to degrade the performance of TCP connections and partially deny service for legitimate users.
Currently we are not aware of any exploits for this issue. If you feel we are in error or if you are aware of more recent information, please mail us at: mailto:email@example.com.
Please see the references for more information.
HP HP-UX B.11.23
HP HP-UX B.11.11