Multiple format string vulnerabilities in isns.c in (1) Linux SCSI target framework (aka tgt or scsi-target-utils) 1.0.3, 0.9.5, and earlier and (2) iSCSI Enterprise Target (aka iscsitarget) 0.4.16 allow remote attackers to cause a denial of service (tgtd daemon crash) or possibly have unspecified other impact via vectors that involve the isns_attr_query and qry_rsp_handle functions, and are related to (a) client appearance and (b) client disappearance messages.
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tgt | Zaal | * | 0.9.5 (including) |
| Tgt | Zaal | 1.0.3 (including) | 1.0.3 (including) |
When an attacker can modify an externally-controlled format string, this can lead to buffer overflows, denial of service, or data representation problems. It should be noted that in some circumstances, such as internationalization, the set of format strings is externally controlled by design. If the source of these format strings is trusted (e.g. only contained in library files that are only modifiable by the system administrator), then the external control might not itself pose a vulnerability.