The pop_msg function in qpopper 4.0.x before 4.0.5fc2 does not null terminate a message buffer after a call to Qvsnprintf, which could allow authenticated users to execute arbitrary code via a buffer overflow in a mdef command with a long macro name.
| Software | From | Fixed in |
|---|---|---|
| qualcomm / qpopper | 4.0.1 | 4.0.1.x |
| qualcomm / qpopper | 4.0.4 | 4.0.4.x |
| qualcomm / qpopper | 4.0.3 | 4.0.3.x |
| qualcomm / qpopper | 4.0.2 | 4.0.2.x |