-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SGI Security Advisory
Title : Denial of Service Vulnerability in NFS XDR decoding Number : 20030801-01-P Date : August 13, 2003 Reference: CVE 2003-0576 Reference: SGI BUG 894659 Fixed in : IRIX 6.5.20 or patches 5229, 5230, 5240, 5241, 5227, 5228 ______________________________________________________________________________ SGI provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. SGI recommends that this information be acted upon as soon as possible. SGI provides the information in this Security Advisory on an "AS-IS" basis only, and disclaims all warranties with respect thereto, express, implied or otherwise, including, without limitation, any warranty of merchantability or fitness for a particular purpose. In no event shall SGI be liable for any loss of profits, loss of business, loss of data or for any indirect, special, exemplary, incidental or consequential damages of any kind arising from your use of, failure to use or improper use of any of the instructions or information in this Security Advisory. ______________________________________________________________________________ - ----------------------- - --- Issue Specifics --- - ----------------------- It's been reported that it is possible to create a Denial of Service attack on the IRIX nfsd through the use of carefully crafted packets which cause XDR decoding errors. This can lead to kernel panicing the system. No local account or access to an NFS mount point is required, so this could be constructed as a remote exploit. SGI has investigated the issue and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL vulnerable SGI systems. These issues have been corrected with patches and in future releases of IRIX. - -------------- - --- Impact --- - -------------- nfs is installed by default on IRIX 6.5 systems. To determine the version of IRIX you are running, execute the following command: # /bin/uname -R That will return a result similar to the following: # 6.5 6.5.19f The first number ("6.5") is the release name, the second ("6.5.16f" in this case) is the extended release name. The extended release name is the "version" we refer to throughout this document. To see if nfs is installed, execute the following command: $ versions -b | grep nfs I nfs 05/15/2003 Network File System, 6.5.20f - ---------------------------- - --- Temporary Workaround --- - ---------------------------- There is no effective workaround available for these problems. SGI recommends either upgrading to IRIX 6.5.20, or installing the appropriate patch from the listing below. - ---------------- - --- Solution --- - ---------------- SGI has provided a series of patches for these vulnerabilities. Our recommendation is to upgrade to IRIX 6.5.20, or install the appropriate patch. OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x unknown Note 1 IRIX 4.x unknown Note 1 IRIX 5.x unknown Note 1 IRIX 6.0.x unknown Note 1 IRIX 6.1 unknown Note 1 IRIX 6.2 unknown Note 1 IRIX 6.3 unknown Note 1 IRIX 6.4 unknown Note 1 IRIX 6.5 yes Notes 2 & 3 IRIX 6.5.1 yes Notes 2 & 3 IRIX 6.5.2 yes Notes 2 & 3 IRIX 6.5.3 yes Notes 2 & 3 IRIX 6.5.4 yes Notes 2 & 3 IRIX 6.5.5 yes Notes 2 & 3 IRIX 6.5.6 yes Notes 2 & 3 IRIX 6.5.7 yes Notes 2 & 3 IRIX 6.5.8 yes Notes 2 & 3 IRIX 6.5.9 yes Notes 2 & 3 IRIX 6.5.10 yes Notes 2 & 3 IRIX 6.5.11 yes Notes 2 & 3 IRIX 6.5.12 yes Notes 2 & 3 IRIX 6.5.13 yes Notes 2 & 3 IRIX 6.5.14 yes Notes 2 & 3 IRIX 6.5.15 yes Notes 2 & 3 IRIX 6.5.16 yes Notes 2 & 3 IRIX 6.5.17m yes 5229 Notes 2, 4 & 5 IRIX 6.5.17f yes 5230 Notes 2, 4 & 5 IRIX 6.5.18m yes 5240 Notes 2, 4 & 5 IRIX 6.5.18f yes 5241 Notes 2, 4 & 5 IRIX 6.5.19m yes 5227 Notes 2, 4 & 5 IRIX 6.5.19f yes 5228 Notes 2, 4 & 5 IRIX 6.5.20 no IRIX 6.5.21 no NOTES 1) This version of the IRIX operating has been retired. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com for more information. 2) If you have not received an IRIX 6.5.X CD for IRIX 6.5, contact your SGI Support Provider or URL: http://support.sgi.com 3) Upgrade to IRIX 6.5.20. 4) Upgrade to IRIX 6.5.20 or install the patch. 5) Note that these patches also include other fixes that are not security related. ##### Patch File Checksums #### Filename: README.patch.5227 Algorithm #1 (sum -r): 12931 11 README.patch.5227 Algorithm #2 (sum): 22414 11 README.patch.5227 MD5 checksum: 7ED03B2BE0DC6DE5D33D81339AB14017 Filename: patchSG0005227 Algorithm #1 (sum -r): 11461 5 patchSG0005227 Algorithm #2 (sum): 37091 5 patchSG0005227 MD5 checksum: 6159ACA5DADB447DBAC03E2713B397F9 Filename: patchSG0005227.eoe_sw Algorithm #1 (sum -r): 09551 8277 patchSG0005227.eoe_sw Algorithm #2 (sum): 30759 8277 patchSG0005227.eoe_sw MD5 checksum: E5339A8B3C9231CC8EFD58CB59FEED1C Filename: patchSG0005227.idb Algorithm #1 (sum -r): 20594 41 patchSG0005227.idb Algorithm #2 (sum): 1408 41 patchSG0005227.idb MD5 checksum: 32BF7447A53E8A9DAD84A2B416674F16 Filename: patchSG0005227.irix_dev_sw Algorithm #1 (sum -r): 38535 10 patchSG0005227.irix_dev_sw Algorithm #2 (sum): 12894 10 patchSG0005227.irix_dev_sw MD5 checksum: D53D8B75C2D7B3A3C925ADCFB35F8B95 Filename: patchSG0005227.nfs_sw Algorithm #1 (sum -r): 31365 5170 patchSG0005227.nfs_sw Algorithm #2 (sum): 49085 5170 patchSG0005227.nfs_sw MD5 checksum: E4F9D5896C4272B81430CF0C8611487C Filename: README.patch.5228 Algorithm #1 (sum -r): 16002 11 README.patch.5228 Algorithm #2 (sum): 22374 11 README.patch.5228 MD5 checksum: 9ED598FCE24B45D9B821BBED49EF4401 Filename: patchSG0005228 Algorithm #1 (sum -r): 37726 5 patchSG0005228 Algorithm #2 (sum): 23213 5 patchSG0005228 MD5 checksum: 3167AD1850E8F6C2CA50F1679C402315 Filename: patchSG0005228.eoe_sw Algorithm #1 (sum -r): 16223 8422 patchSG0005228.eoe_sw Algorithm #2 (sum): 46670 8422 patchSG0005228.eoe_sw MD5 checksum: EFB7678E25D935BFDF9B8531786FE67A Filename: patchSG0005228.idb Algorithm #1 (sum -r): 53530 41 patchSG0005228.idb Algorithm #2 (sum): 21988 41 patchSG0005228.idb MD5 checksum: 92B4E031662EEF88415D18A2ABE8CA74 Filename: patchSG0005228.irix_dev_sw Algorithm #1 (sum -r): 38535 10 patchSG0005228.irix_dev_sw Algorithm #2 (sum): 12894 10 patchSG0005228.irix_dev_sw MD5 checksum: D53D8B75C2D7B3A3C925ADCFB35F8B95 Filename: patchSG0005228.nfs_sw Algorithm #1 (sum -r): 17463 5280 patchSG0005228.nfs_sw Algorithm #2 (sum): 25872 5280 patchSG0005228.nfs_sw MD5 checksum: DCEAE822C6F2AE0335987F8D4CB22037 Filename: README.patch.5229 Algorithm #1 (sum -r): 01277 9 README.patch.5229 Algorithm #2 (sum): 828 9 README.patch.5229 MD5 checksum: 27F5BC248785EB885A13CC882BC3546F Filename: patchSG0005229 Algorithm #1 (sum -r): 35802 2 patchSG0005229 Algorithm #2 (sum): 57891 2 patchSG0005229 MD5 checksum: FC923269FA4B82B7B74C6406982A9BF7 Filename: patchSG0005229.eoe_sw Algorithm #1 (sum -r): 64586 5941 patchSG0005229.eoe_sw Algorithm #2 (sum): 16069 5941 patchSG0005229.eoe_sw MD5 checksum: 566A389D3F36A1398FA7EEC56BF175B9 Filename: patchSG0005229.idb Algorithm #1 (sum -r): 38401 26 patchSG0005229.idb Algorithm #2 (sum): 7466 26 patchSG0005229.idb MD5 checksum: 60B99ECECF97909AEF3F4A2DE88D82F5 Filename: patchSG0005229.irix_dev_sw Algorithm #1 (sum -r): 34148 1 patchSG0005229.irix_dev_sw Algorithm #2 (sum): 774 1 patchSG0005229.irix_dev_sw MD5 checksum: 782988FA4FAC22A5F522D4985B47D6CB Filename: patchSG0005229.nfs_sw Algorithm #1 (sum -r): 09009 4240 patchSG0005229.nfs_sw Algorithm #2 (sum): 65046 4240 patchSG0005229.nfs_sw MD5 checksum: C8D28197ABBFB214E312BE5474089CFE Filename: README.patch.5230 Algorithm #1 (sum -r): 12236 9 README.patch.5230 Algorithm #2 (sum): 63420 9 README.patch.5230 MD5 checksum: 12E5B2318D3B3516409D084C27387163 Filename: patchSG0005230 Algorithm #1 (sum -r): 50666 2 patchSG0005230 Algorithm #2 (sum): 59311 2 patchSG0005230 MD5 checksum: 44FE30C482E00898A48FB5C865A63FF3 Filename: patchSG0005230.eoe_sw Algorithm #1 (sum -r): 29102 6011 patchSG0005230.eoe_sw Algorithm #2 (sum): 39184 6011 patchSG0005230.eoe_sw MD5 checksum: 3BEB537E47F3A199311CD8D0B1819D04 Filename: patchSG0005230.idb Algorithm #1 (sum -r): 05200 26 patchSG0005230.idb Algorithm #2 (sum): 7102 26 patchSG0005230.idb MD5 checksum: 3E3AE7ACC124D1789D16E6510C58D9DB Filename: patchSG0005230.nfs_sw Algorithm #1 (sum -r): 47262 4333 patchSG0005230.nfs_sw Algorithm #2 (sum): 29161 4333 patchSG0005230.nfs_sw MD5 checksum: 08121F4C697F3FF84C3555B05403ECCD Filename: README.patch.5240 Algorithm #1 (sum -r): 49573 10 README.patch.5240 Algorithm #2 (sum): 6006 10 README.patch.5240 MD5 checksum: 35487EA3FE038B6460A592261C04EFCD Filename: patchSG0005240 Algorithm #1 (sum -r): 07297 4 patchSG0005240 Algorithm #2 (sum): 50257 4 patchSG0005240 MD5 checksum: 256FFFFC0DD9FD4FB7AABC2016E77E76 Filename: patchSG0005240.eoe_sw Algorithm #1 (sum -r): 47611 7496 patchSG0005240.eoe_sw Algorithm #2 (sum): 33432 7496 patchSG0005240.eoe_sw MD5 checksum: 694361E17A3C8147099E946EBD277A08 Filename: patchSG0005240.idb Algorithm #1 (sum -r): 06906 26 patchSG0005240.idb Algorithm #2 (sum): 63464 26 patchSG0005240.idb MD5 checksum: 5B8066AEB25AE8DC988181B6318FA0FD Filename: patchSG0005240.irix_dev_sw Algorithm #1 (sum -r): 38535 10 patchSG0005240.irix_dev_sw Algorithm #2 (sum): 12894 10 patchSG0005240.irix_dev_sw MD5 checksum: D53D8B75C2D7B3A3C925ADCFB35F8B95 Filename: patchSG0005240.nfs_sw Algorithm #1 (sum -r): 40380 3891 patchSG0005240.nfs_sw Algorithm #2 (sum): 34675 3891 patchSG0005240.nfs_sw MD5 checksum: 71E454F5DF8B7B231BE5534CEFFC1EC8 Filename: README.patch.5241 Algorithm #1 (sum -r): 12584 10 README.patch.5241 Algorithm #2 (sum): 5979 10 README.patch.5241 MD5 checksum: 4C1EE3B73CDD4851D06E73BBB21D65D1 Filename: patchSG0005241 Algorithm #1 (sum -r): 05691 5 patchSG0005241 Algorithm #2 (sum): 13971 5 patchSG0005241 MD5 checksum: 5C6423A1D130E749E6644CDE3CD73FF3 Filename: patchSG0005241.eoe_sw Algorithm #1 (sum -r): 00113 7607 patchSG0005241.eoe_sw Algorithm #2 (sum): 34258 7607 patchSG0005241.eoe_sw MD5 checksum: 5596F7572B50139B776BF011C70E82FC Filename: patchSG0005241.idb Algorithm #1 (sum -r): 22072 26 patchSG0005241.idb Algorithm #2 (sum): 63480 26 patchSG0005241.idb MD5 checksum: 3CC8B8E45D008D213B8CB84034675509 Filename: patchSG0005241.irix_dev_sw Algorithm #1 (sum -r): 38535 10 patchSG0005241.irix_dev_sw Algorithm #2 (sum): 12894 10 patchSG0005241.irix_dev_sw MD5 checksum: D53D8B75C2D7B3A3C925ADCFB35F8B95 Filename: patchSG0005241.nfs_sw Algorithm #1 (sum -r): 09049 3954 patchSG0005241.nfs_sw Algorithm #2 (sum): 32772 3954 patchSG0005241.nfs_sw MD5 checksum: B28A5B503F0B5C85D62C76A666667685 - ------------- - --- Links --- - ------------- SGI Security Advisories can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/advisories/ SGI Security Patches can be found at: http://www.sgi.com/support/security/ and 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A support contract is not required for submitting a security report. ______________________________________________________________________________ This information is provided freely to all interested parties and may be redistributed provided that it is not altered in any way, SGI is appropriately credited and the document retains and includes its valid PGP signature. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBPzppWbQ4cFApAP75AQE6rgP+PkfnTLfdlvdFZ4tJ+Ht3vTBVmJu2kgvz itgHnZftncL4JaIfdJks2Wr34/2q7q2tIzn11376Twl1olPkP5Q+LdQiFgVTTjdF KI4D1SwBGkxVqB3w6H/TUexSxk+77wJHckrpyOlIhm364wV20YYimQSQAFWJr+4m riLbLOyRc/o= =8VNZ -----END PGP SIGNATURE-----