Description
ProFTPD before 1.3.9e and 1.3.10rc5 contains a buffer overflow vulnerability in the mod_rewrite int:utf8trans RewriteMap that allows remote attackers to overwrite static buffers. Attackers can send FTP command arguments longer than 1024 bytes, without authentication if pre-login commands are rewritten, to corrupt session memory and crash the session.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ProFTPD Project | ProFTPD | < 1.3.9e, 1.3.10rc1 – < 1.3.10rc5 | 1.3.9e |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | proftpd-dfsg | 1.3.9e~dfsg-1 | — |
| Debian 13 | proftpd-dfsg | No fix yet | — |
| Debian 12 | proftpd-dfsg | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | proftpd-dfsg | No fix yet | — |
| Ubuntu 26.04 LTS | proftpd-dfsg | No fix yet | — |
| Ubuntu 24.04 LTS | proftpd-dfsg | No fix yet | — |
| Ubuntu 22.04 LTS | proftpd-dfsg | No fix yet | — |
| Ubuntu 20.04 LTS | proftpd-dfsg | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | proftpd-dfsg | No fix yet | — |
| Ubuntu 16.04 LTS | proftpd-dfsg | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | proftpd | 1.3.9e-r0 | — |
| Alpine v3.23 | proftpd | 1.3.9e-r0 | — |
References
- https://github.com/proftpd/proftpd/commit/502d280b8d0ef72e44c6dd0a35a9405af0a1e301 patch
- https://github.com/proftpd/proftpd/blob/v1.3.9d/contrib/mod_rewrite.c#L2052 technical-description
- ProFTPD v1.3.9e Release Notes release-notes
- ProFTPD v1.3.10rc5 Release Notes release-notes
- https://abraxaslabs.tech/research/proftpd-rewrite-utf8trans third-party-advisory
- https://github.com/proftpd/proftpd product
- VulnCheck Advisory: ProFTPD before 1.3.9e and 1.3.10rc5 Buffer Overflow via mod_rewrite utf8trans RewriteMap third-party-advisory