When the channel topic is set without specifying a sender, Irssi before 1.0.6 may dereference a NULL pointer.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-5206 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 5.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | irssi | Will not fix |
| Red Hat Enterprise Linux 6 | irssi | Will not fix |
Vulmon