Courier Mta · Maildrop · CVE-2010-0301
**Name of the Vulnerable Software and Affected Versions**
maildrop versions 2.3.0 and earlier
**Description**
The issue allows local users to gain privileges via a crafted .mailfilter file in a user's home directory. This occurs when maildrop is run by root with the -d option, as it uses the gid of root for execution of the .mailfilter file.
**Recommendations**
For versions 2.3.0 and earlier, consider restricting access to the .mailfilter file to prevent exploitation until a fix is available. As a temporary workaround, avoid running maildrop with the -d option as root to minimize the risk of privilege escalation.