An untrusted pointer dereference flaw was found in Perl-DBI < 1.643. A local attacker who is able to manipulate calls to dbd_db_login6_sv() could cause memory corruption, affecting the services availability.
The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Database_interface | Perl | * | 1.643 (excluding) |
| Libdbi-perl | Ubuntu | bionic | * |
| Libdbi-perl | Ubuntu | trusty | * |
| Libdbi-perl | Ubuntu | trusty/esm | * |
| Libdbi-perl | Ubuntu | upstream | * |
| Libdbi-perl | Ubuntu | xenial | * |
An attacker can supply a pointer for memory locations that the product is not expecting. If the pointer is dereferenced for a write operation, the attack might allow modification of critical state variables, cause a crash, or execute code. If the dereferencing operation is for a read, then the attack might allow reading of sensitive data, cause a crash, or set a variable to an unexpected value (since the value will be read from an unexpected memory location). There are several variants of this weakness, including but not necessarily limited to: