GHSA-g49q-jw42-6x85 thelounge may publicly disclose of all usernames/idents via port 113
TheLounge server exposes user identities via ident protocol, allowing attackers to enumerate usernames without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GHSA-g49q-jw42-6x85?
GHSA-g49q-jw42-6x85 is a vulnerability in thelounge, published on 9 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Per RFC 1413, The unique identifying tuple includes not only the ports, but also the both addresses. Without the addresses, the information becomes both non-unique and public:
- If multiple connections happen to use the same local port number (which is possible if the addresses differ), the username of the first is returned for all, resulting in the wrong ident for all but the first.
- By not checking the connection address, the information becomes public. Because there is only a relatively small number of local ports, and the remote ports are likely to be either 6667 or 6697, it becomes trivial to scan the entire range to get a list of idents.
To prevent this from happening, disable identd or upgrade to a non vulnerable version.
Which versions are affected by GHSA-g49q-jw42-6x85?
2 open source packages ship an affected version, including thelounge.
| Package | Affected | Fixed in |
|---|---|---|
thelounge npm | All versions to 4.4.3 | None |
thelounge npm | All versions to 4.4.3 | None |
How do I fix GHSA-g49q-jw42-6x85?
No fix has been published for GHSA-g49q-jw42-6x85 yet. Limit exposure of the affected software until one is available.
Is GHSA-g49q-jw42-6x85 being exploited?
There is no known exploitation of GHSA-g49q-jw42-6x85 in the wild and no public exploit code.