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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0152 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0302-246 Potential Security Vulnerability in sendmail (rev.1) 06 March 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Sendmail Vendor: Hewlett-Packard Operating System: HP-UX 11.22 HP-UX 11.11 HP-UX 11.04 HP-UX 11.00 HP-UX 10.20 HP-UX 10.10 Platform: HP 9000 Series 700/800 Impact: Root Compromise Denial of Service Access Required: Remote Ref: AA-2003.01 ESB-2003.0143 Comment: CVE Id: CAN-2002-1337 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ----------------------------------------------------------------- ** REVISED 01** Source: HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0302-246 Originally issued: 03 March 2003 Last revised: 04 March 2003 SSRT3469 Potential Security Vulnerability in sendmail (rev.1) ----------------------------------------------------------------- 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: Potential security vulnerability in sendmail IMPACT: Potential unauthorized Privileged Access, Potential Denial of Service (DoS). PLATFORM: HP 9000 Series 700/800 Servers running HP-UX 10.10, 10.20, 11.00, 11.04, 11.11, and 11.22. SOLUTION: Download and install the appropriate sendmail file. MANUAL ACTIONS: Yes - NonUpdate Download and install the appropriate sendmail file. AVAILABILITY: This bulletin will be revised when patches are available. CHANGE SUMMARY: Rev.01 - Added information on upgrading from 8.8.6 to 8.9.3 or 8.11.1. Added information on warning messages. Added CERT and CVE reference numbers. ----------------------------------------------------------------- A. Background A potential security vulnerability with sendmail has been reported in HP-UX. This potential vulnerability may result in unauthorized Privileged Access or a Denial of Service (DoS). This potential vulnerability may be exploited remotely. ** REVISED 01** -->This is the vulnerability reported in CERT/CC CA-2003-07. -->CERT/CC is tracking this issue as VU#398025 This reference -->number corresponds to CVE candidate CAN-2002-1337. This problem also affects HP Tru64 UNIX/Trucluster Server. NOTE: This problem does not impact HP NonStop Servers nor HP OpenVMS. The HP Tru64 bulletin will be posted to the customer support website within 24 hours of release to - http://thenew.hp.com/country/us/eng/support.html or www.hp.com Use the SEARCH IN feature box, enter SSRT in the search window or use a specific SSRT # example: SSRT3469 B. Recommended solution ** REVISED 01** -->If you are ruuning 8.8.6 on HP-UX 10.20, -->upgrade to 8.9.3 by by installing PHNE_25183. -->Then apply sendmail.893.11.00 as described below. -->If you are ruuning 8.8.6 on HP-UX 11.00, -->upgrade to 8.9.3 by by installing PHNE_24419. -->Then apply sendmail.893.11.00 as described below. --> OR -->Upgrade to 8.11.1 by installing the web upgrade -->available on http://www.software.hp.com -->Then apply sendmail.811.11.00 as described below. Determine if you are running a vulnerable version of sendmail: Login in as root: cd /usr/sbin sendmail -d0.1 < /dev/null | grep -i version The display will show Version #.#.# HP Versions affected: 8.8.6, 8.9.3, 8.11.1 Download the appropriate file: For HP-UX 10.10: sendmail.886.10.01.gz For HP-UX 10.20: sendmail.893.10.20.gz For HP-UX 11.00: sendmail.811.11.00.gz sendmail.893.11.00.gz For HP-UX 11.04: sendmail.811.11.00.gz sendmail.893.11.00.gz For HP-UX 11.11: sendmail.811.11.11.gz sendmail.893.11.11.gz For HP-UX 11.22: sendmail.811.11.22.gz The files are available from the following site: System: hprc.external.hp.com (192.170.19.51) Login: sendmail Password: sendmail FTP Access: ftp://sendmail:sendmail@hprc.external.hp.com/ or: ftp://sendmail:sendmail@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 Unpack the file with gunzip(1). Verify the cksum or the md5 sum: cksum: 2052507672 401408 sendmail.886.10.01 3975773765 806912 sendmail.893.10.20 2575934578 970752 sendmail.811.11.00 905487102 827392 sendmail.893.11.00 3003791603 1015808 sendmail.811.11.11 3842273936 860160 sendmail.893.11.11 3819176330 2281732 sendmail.811.11.22 Note: If you wish to verify the md5 sum and you do not have a copy of md5, please refer to: HPSBUX9408-016 Patch sums and the MD5 program Note: Using your itrc account security bulletins can be found here: http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin MD5 (sendmail.886.10.01) = 2af7445285f285a7865fb9c202b500fe MD5 (sendmail.893.10.20) = fbc327a2be485b63a8d884f9a727648f MD5 (sendmail.811.11.00) = aff4e97d8a07cdf23b68359b1e72494e MD5 (sendmail.893.11.00) = a7f5c7d9004b04d95b895b8b5f703ac5 MD5 (sendmail.811.11.11) = 4bbf09bf6ce4e9f814eecbcc632c7816 MD5 (sendmail.893.11.11) = 54d63cf32720b66bee44e79b634c9741 MD5 (sendmail.811.11.22) = 9871b8fd59f9aa39e66da2185681710e Copy the file to a protected directory such as /usr/sbin. Login as root and run killsm: killsm Verify the sendmail daemon is not running: ps -ef | grep sendmail Make a backup copy of the existing sendmail: cd /usr/sbin cp sendmail sendmail.original Note the permissions for reference: ls -lia /usr/sbin/sendmail Install the new sendmail: cp sendmail.xxx.yy.zz sendmail For example, on 11.22: cp sendmail.811.11.22 sendmail **REVISED 01** Restart sendmail. --> If you were running sendmail before the killsm --> command above, you can now restart it with the --> following command: /sbin/init.d/sendmail start -->Note: If you receive either of the following messages after -->applying the fix, please follow the recommended action. --> warning: /etc/mail/aliases has world read or --> write permission. This is unsafe. --> warning: /etc/mail/aliases.db has world read or --> write permission. This is unsafe. --> Recommended action --> Execute the following commands. --> chmod 640 /etc/mail/aliases --> chmod 640 /etc/mail/aliases.db --> sendmail -bi 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. 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". 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 Personal Security 7.0.3 iQA/AwUBPmUe2+AfOvwtKn1ZEQJpHwCfXPIWAu6stNzfEuSnEnXEPtIUQJUAn2SD RaW1bBGjMX8kjcHhEzutUBV7 =aCz3 - -----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. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). 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----- Version: 2.6.3i Charset: noconv Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBPmczOih9+71yA2DNAQHddAP/fObhN9mblTRSTJ5PIiRRdppAJQca/Jzy z8fBl50U3XlHzl0oSdLY1S1mdvWzfOPcYTN3Gy5RSXBThRGKY3AzGGSHFePI3B7T +ULSEGEHhiJlFPwogxZhQonfWbFLorh+gO85WIeDfmB4nnj+r6r2LZJ/Bvc95ROP MXFy2YRS01A= =Fs6b -----END PGP SIGNATURE-----