SSRT3588
Published: 2003-08-25 14:42:30
Updated: 2003-08-25 14:42:30
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SECURITY BULLETIN REVISION: 0 SSRT3588 - (Tru64) A Potential Security Vulnerability With ssh - ----------------------------------------------------------- NOTICE: There are no restrictions for distribution of this Bulletin provided that it remains complete and intact. RELEASE DATE: 25 August 2003 SEVERITY: 1 SOURCE: HEWLETT-PACKARD COMPANY Software Security Response Team REFERENCE: None PROBLEM SUMMARY A potential security vulnerability may exist where HP Tru64 UNIX running ssh could allow local or remote users to gain unauthorized privileged access because ssh (Secure Shell) incorrectly handled RSA signatures when using digital certificates and RSA keys. VERSIONS IMPACTED HP Tru64 UNIX 5.1B PK2 (BL22) HP Tru64 UNIX 5.1A (all Base Levels) RESOLUTION HP Tru64 UNIX 5.1A An updated version of ssh containing the corrections for this potential security vulnerability is available for download for Tru64 UNIX 5.1A systems, from the following location: http://h30097.www3.hp.com/unix/ssh/index.html HP Tru64 UNIX 5.1B The correction for Tru64 UNIX 5.1B will be available in the next aggregate patch kit , 5.1B PK3. Until the next aggregate patch kit for 5.1B is available, HP recommends using the DSA algorithm workaround as outlined below. HP recommends using the DSA algorithm rather than the RSA algorithm until such time the vulnerability is corrected. The workaround for 5.1B is to use DSA, the default public key algorithm, and other user authentication methods that are not affected by the potential vulnerability. To choose the DSA algorithm rather than the RSA algorithm when generating host or client key pairs, either specify the "-t dsa" or, since DSA is the default, just don't specify the - -t option at all. Example for explicitly specifying DSA: # ssh-keygen2 -t dsa SUPPORT: For further information, contact HP Services. SUBSCRIBE: To subscribe to automatically receive future Security Advisories from the Software Security Response Team via electronic mail: http://www.support.compaq.com/patches/mail-list.shtml REPORT: To report a potential security vulnerability with any HP supported product, send email to: security-alert@hp.com As always, HP urges you to periodically review your system management and security procedures. HP will continue to review and enhance the security features of its products and work with our customers to maintain and improve the security and integrity of their systems. "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." (c)Copyright 2001, 2003 Hewlett-Packard Development Company, L.P. 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 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 Personal Security 7.0.3 iQA/AwUBP0tHvOAfOvwtKn1ZEQKH8gCaA7nzvUjVXnfVExM1ZS4Hk5kkjj8AoNeX X21WlBCOin55Qs+SyzaoM3VN =8mv4 -----END PGP SIGNATURE-----
