First published: Tue Aug 08 2017(Updated: )
On Windows systems, the logger run by the Windows updater deletes the file "update.log" before it runs in order to write a new log of that name. The path to this file is supplied at the command line to the updater and could be used in concert with another local exploit to delete a different file named "update.log" instead of the one intended. Note: This attack only affects Windows operating systems. Other operating systems are not affected.
Credit: security@mozilla.org
Affected Software | Affected Version | How to fix |
---|---|---|
Mozilla Firefox | <55 | 55 |
<55 | 55 | |
Mozilla Firefox | <55.0 | |
Microsoft Windows |
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(Found alongside the following vulnerabilities)
CVE-2017-7796 has a moderate severity level due to its potential for abuse in conjunction with other local exploits.
To mitigate CVE-2017-7796, users should upgrade Firefox to version 55 or later.
CVE-2017-7796 affects Windows systems running Mozilla Firefox versions prior to 55.
Yes, Firefox versions below 55 are vulnerable to CVE-2017-7796.
CVE-2017-7796 allows for the deletion of files by manipulating the update log path provided to the Windows updater.