Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0697 -- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX0310-284 SSRT3622 Potential Security Vulnerabilities in Apache HTTP Server 03 October 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: OpenSSL Publisher: Hewlett-Packard Operating System: HP-UX release 11.23 HP-UX release 11.22 HP-UX release 11.20 HP-UX release 11.11 HP-UX release 11.00 Impact: Denial of Service Access Required: Remote CVE Names: CAN-2003-0543, CAN-2003-0544, CAN-2003-0545 Ref: AL-2003.18 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ----------------------------------------------------------------- Source: HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0310-284 Originally issued: 01 Oct 2003 SSRT3622 Potential Security Vulnerabilities in Apache HTTP Server ----------------------------------------------------------------- NOTICE: There are no restrictions for distribution of this Bulletin provided that it remains complete and intact. The information in the following Security Bulletin should be acted upon as soon as possible. Hewlett-Packard Company will not be liable for any consequences to any customer resulting from customer's failure to fully implement instructions in this Security Bulletin as soon as possible. ----------------------------------------------------------------- PROBLEM: 1. Certain ASN.1 encodings that are rejected as invalid by the parser can trigger a bug in the deallocation of the corresponding data structure, corrupting the stack. This can be used as a denial of service attack. It is currently unknown whether this can be exploited to run malicious code. This issue does not affect OpenSSL 0.9.6. More details are available at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0545 2. Unusual ASN.1 tag values can cause an out of bounds read under certain circumstances, resulting in a denial of service vulnerability. More details are available at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0543 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0544 3. A malformed public key in a certificate will crash the verify code if it is set to ignore public key decoding errors. Exploitation of an affected application would result in a denial of service vulnerability. 4. Due to an error in the SSL/TLS protocol handling, a server will parse a client certificate when one is not specifically requested. IMPACT: Potential Denial of Service PLATFORM: HP9000 Servers running HP-UX release B.11.00, B.11.11, B.11.20, B.11.22, and B.11.23 with versions of the following products are affected, and represented as: product-name, version (product-tag/bundle-tag) - hp apache-based web server, 2.0.43.04 or earlier (HPApache/B9416AA) This product includes OpenSSL 0.9.6b. - hp-ux apache-based web server, v.1.0.06.02 or earlier (hpuxwsAPACHE/hpuxwsApache) This product includes OpenSSL 0.9.6i. - hp apache-based web server, 2.0.43.04 (with IPv6 support), or earlier (HPApache/B9416BA) This product includes OpenSSL 0.9.6b. - hp-ux apache-based web server(with IPv6 support), v.1.0.07.01 or earlier (hpuxwsAPACHE/hpuxwsApache) This product includes OpenSSL 0.9.6i. SOLUTION: For HP-UX releases B.11.00, B.11.11, B.11.20, B.11.22, and B.11.23 download new HP Apache product from the ftp site (see below for details). For HPApache/B9416AA, HPApache/B9416BA and hpuxwsAPACHE/hpuxwsApache download the following: - hp-ux apache-based web server (with IPv4) A.1.0.08.01 or later (hpuxwsAPACHE/hpuxwsApache) This product includes OpenSSL 0.9.7b + patches. - hp-ux apache-based web server(with IPv6 support), B.1.0.08.01 or later (hpuxwsAPACHE/hpuxwsApache) This product includes OpenSSL 0.9.7b + patches. MANUAL ACTIONS: Yes - Update Install the product containing the fix. For customers with HPApache/B9416AA HPApache/B9416BA installed, the fix requires removing the affected products from the system and migration to hpuxwsAPACHE/hpuxwsApache. AVAILABILITY: Complete product bundles are available from the ftp site (see below for details). ----------------------------------------------------------------- A. Background An SSL/TLS testing suite developed by the NISCC (National Infrastructure Security Co-Ordination Centre in the UK) has identified ASN.1 parsing vulnerabilities in OpenSSL. The Common Vulnerabilities and Exposures project <http://cve.mitre.org/> has identified potential vulnerabilities in the Apache HTTP Server (CAN-2003-0543, CAN-2003-0544). AFFECTED VERSIONS ================== The affected filesets are: (product.fileset) For IPv4: HP-UX B.11.00 HP-UX B.11.11 HP-UX B.11.22 HPApache.APACHE2 hpuxwsAPACHE.APACHE2 fix: revision A.1.0.08.01 or subsequent For IPv6: HP-UX B.11.11 HP-UX B.11.23 ============= HPApache.APACHE2 hpuxwsAPACHE.APACHE2 fix: revision B.1.0.08.01 or subsequent END AFFECTED VERSIONS B. Recommended solution For customers using HPApache/B9416BA and hpuxwsAPACHE/ hpuxwsApache, HP has incorporated OpenSSL 0.9.7b + patches in the following product: - hp-ux apache-based web server version 1.0.08.01 or later System: hprc.external.hp.com (192.170.19.51) Login: apache1 Password: apache1 FTP Access: ftp://apache1:apache1@hprc.external.hp.com/ or: ftp://apache1:apache1@192.170.19.51/ or: ftp hprc.external.hp.com Note: There is an ftp defect in IE5 that may result in a browser hang. To work around this: - Select Tools -> Internet Options -> Advanced - Un-check the option: [ ] Enable folder view for FTP sites ================================================== To fix the problem: 1. Determine the affected version. 2. Download and verify the cksum or md5 sum. 3. Install the appropriate Apache depot. cksum: 2820606652 77844480 A.1.0.08.01.1100.depot 84183799 91555840 A.1.0.08.01.1122.depot 774435972 77875200 B.1.0.08.01.ipv6.depot 871663669 116940800 B.1.0.08.01.1123.depot MD5: A.1.0.08.01.1100.depot 4D60A779EEFFD5953EE52371E1F17AD9 A.1.0.08.01.1122.depot 483DBFF44D9B79C04CD1ABF71A692E05 B.1.0.08.01.1123.depot B8B2D2609D2A43ABAD63BE0A3DC7C61E B.1.0.08.01.ipv6.depot 866E9B4D3102EA6FF34CCCA8171B43CB Check for Apache Installation ----------------------------- To determine if the Apache web server from HP is installed on your system, use Software Distributor's swlist command. All three versions products may co-exist on a single system. For example, the results of the command swlist -l product | grep -i apache might show: HPApache 2.0.39.01.02 HP Apache-based Web Server hpuxwsAPACHE A.1.0.05.01 HP-UX Apache-based Web Server Stop Apache ----------------------------- Before updating, make sure to stop any previous Apache binary. Otherwise, the previous binary will continue running, preventing the new one from starting, although the installation would be successful. After determining which Apache is installed, stop Apache with the following commands: for HPApache: /opt/hpapache2/bin/apachectl stop for hpuxwsAPACHE: /opt/hpws/apache/bin/apachectl stop Download and Install Apache ----------------------------- - Download Apache from temporary ftp site using the previously mentioned links. - Verify successful download by comparing the cksum/md5 with the value specified on the installation web page. - Use SD to swinstall the depot. - For customers with HPApache/B9416BA installed, migrate to hpuxwsAPACHE/hpuxwsApache and remove the affected products from the system. Installation of this new version of HP Apache over an existing HP Apache installation is supported, while installation over a non-HP Apache is NOT supported. Removing Apache Installation ---------------------------- If you rather remove Apache from your system than install a newer version to resolve the security problem, use both Software Distributor's "swremove" command and also "rm -rf" the home location as specified in the rc.config.d file "HOME" variables. To find the files containing HOME variables in the /etc/rc.config.d directory: %ls /etc/rc.config.d | grep apache hpapache2conf hpws_apacheconf C. To subscribe to automatically receive future NEW HP Security Bulletins from the HP IT Resource Center via electronic mail, do the following: Use your browser to get to the HP IT Resource Center page at: http://itrc.hp.com Use the 'Login' tab at the left side of the screen to login using your ID and password. Use your existing login or the "Register" button at the left to create a login, in order to gain access to many areas of the ITRC. Remember to save the User ID assigned to you, and your password. In the left most frame select "Maintenance and Support". Under the "Notifications" section (near the bottom of the page), select "Support Information Digests". To -subscribe- to future HP Security Bulletins or other Technical Digests, click the check box (in the left column) for the appropriate digest and then click the "Update Subscriptions" button at the bottom of the page. or To -review- bulletins already released, select the link (in the middle column) for the appropriate digest. NOTE: Using your itrc account security bulletins can be found here: http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin To -gain access- to the Security Patch Matrix, select the link for "The Security Bulletins Archive". (near the bottom of the page) Once in the archive the third link is to the current Security Patch Matrix. Updated daily, this matrix categorizes security patches by platform/OS release, and by bulletin topic. Security Patch Check completely automates the process of reviewing the patch matrix for 11.XX systems. Please note that installing the patches listed in the Security Patch Matrix will completely implement a security bulletin _only_ if the MANUAL ACTIONS field specifies "No." The Security Patch Check tool can verify that a security bulletin has been implemented on HP-UX 11.XX systems providing that the fix is completely implemented in a patch with no manual actions required. The Security Patch Check tool cannot verify fixes implemented via a product upgrade. For information on the Security Patch Check tool, see: http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/ displayProductInfo.pl?productNumber=B6834AA The security patch matrix is also available via anonymous ftp: ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/ On the "Support Information Digest Main" page: click on the "HP Security Bulletin Archive". The PGP key used to sign this bulletin is available from several PGP Public Key servers. The key identification information is: 2D2A7D59 HP Security Response Team (Security Bulletin signing only) <security-alert@hp.com> Fingerprint = 6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59 If you have problems locating the key please write to security-alert@hp.com. Please note that this key is for signing bulletins only and is not the key returned by sending 'get key' to security-alert@hp.com. D. To report new security vulnerabilities, send email to security-alert@hp.com Please encrypt any exploit information using the security-alert PGP key, available from your local key server, or by sending a message with a -subject- (not body) of 'get key' (no quotes) to security-alert@hp.com. ----------------------------------------------------------------- (c)Copyright 2003 Hewlett-Packard Company Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of HP products referenced herein are trademarks and/or service marks of Hewlett-Packard Company. Other product and company names mentioned herein may be trademarks and/or service marks of their respective owners. ________________________________________________________________ - - -- - -----BEGIN PGP SIGNATURE----- Version: PGP 8.0 iQA/AwUBP3t3XuAfOvwtKn1ZEQLJtwCggtLPgH7k7uJZHcj/ICAl9X/tzQMAoPnL YkwT3tTmT4hEDg/nl3/fLA5a =0uQh - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBP3zdOyh9+71yA2DNAQHxZAP/UtASK2t+YCgX+t2MCtYgHjX8Cm2RXc1a 8CIby36+23MTsPLEQQz93RKFB5xpIjrF8IMBi5Dx1N3T3VhXK9GoCfOWCTVbAr8x QfUn7qiO0s/Q4RrVtB3jaFutg1U7xrmkeVLTgEuU+p2E++e04kkrp5qqLuNTVgel mouaAccoBLc= =Ccr1 -----END PGP SIGNATURE-----