They urge you to act on this information as soon as possible. Installed versions of Lynx up to and including version 2.7.1 on Unix or Unix-like operating systems are vulnerable. This includes public Lynxes as well as any setup where the user is restricted as to which programs can be run. Patches you may find from before that date may not entirely eliminate the vulnerability. All systems running Lynx versions 2.7.1 or earlier should be updated to fix this problem.
More help is available in the source distribution.
CIAC wishes to acknowledge the contributions of CERT and Jim Spath for the information contained in this bulletin. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.