pupnp is an SDK for development of UPnP device and control point applications. Prior to version 1.18.5, pupnp is vulnerable to SRRF port confusion due to port truncation via atoi() cast in parse_uri(). This issue has been patched in version 1.18.5.
Weakness
The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libupnp | Ubuntu | esm-apps/xenial | * |
| Mediatomb | Ubuntu | esm-apps/xenial | * |
Extended Description
It is dangerous to rely on implicit casts between signed and unsigned numbers because the result can take on an unexpected value and violate assumptions made by the program. Often, functions will return negative values to indicate a failure. When the result of a function is to be used as a size parameter, using these negative return values can have unexpected results. For example, if negative size values are passed to the standard memory copy or allocation functions they will be implicitly cast to a large unsigned value. This may lead to an exploitable buffer overflow or underflow condition.