Title: Sun Solaris Text Editor ed Temporary File Creation Vulnerability
Severity: MODERATE
Description:
ed is a is a line-oriented text editor.
A vulnerability has been reported to be present in Sun Solaris that may allow an attacker to overwrite or create any file on the system. It has been reported that if root uses the text editor ed(1), the attacker may access the file therefore symbolic link attacks are possible. A local user may be able to exploit this issue by creating malicious symbolic links.
It is possible that this issue results from inadequate checks on the existence of a predictable temporary file prior to an attempt to create the file during program execution. By creating a symbolic link, an attacker could potentially destroy data at the location of which the symbolic link references, or perform other attacks such as gaining elevated privileges. If the file pointed to by the symbolic link is writeable by the user running ed, the file will be overwritten or deleted if the attacker chooses the correct filenames.
Affected Products:
- Sun Solaris 2.6
- Sun Solaris 2.6_x86
- Sun Solaris 7.0
- Sun Solaris 7.0_x86
- Sun Solaris 8
- Sun Solaris 8_x86
References:
- Sun: Sun Alert ID: 57443
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