Date Discovered September 30, 2003
Description Multiple vulnerabilities were reported in the ASN.1 parsing code in OpenSSL. Attackers could exploit these issues to cause a denial of service or to execute arbitrary code.
Block external access at the network boundary, unless external parties require service. If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploitation.
Implement multiple redundant layers of security. Memory-protection schemes such as nonexecutable stack/heap configurations and randomly mapped memory segments may complicate exploitation of memory-corruption vulnerabilities.
Run all software as a nonprivileged user with minimal access rights.
Multiple applications may provide attack vectors for these issues. Always run software that does't explictly require elevated privileges as an unprivileged user with minimal access rights.
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from firstname.lastname@example.org
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and email@example.com
are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.