log.c in Squid Analysis Report Generator (sarg) through 2.3.11 allows local privilege escalation. By default, it uses a fixed temporary directory /tmp/sarg. As the root user, sarg creates this directory or reuses an existing one in an insecure manner. An attacker can pre-create the directory, and place symlinks in it (after winning a /tmp/sarg/denied.int_unsort race condition). The outcome will be corrupted or newly created files in privileged file system locations.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Squid_analysis_report_generator | Squid_analysis_report_generator_project | * | 2.3.11 (including) |
| Sarg | Ubuntu | bionic | * |
| Sarg | Ubuntu | disco | * |
| Sarg | Ubuntu | eoan | * |
| Sarg | Ubuntu | trusty | * |
| Sarg | Ubuntu | xenial | * |