Description
Multiple stack-based buffer overflows in the use of FD_SET in TCPreen before 1.4.4 allow remote attackers to cause a denial of service via multiple concurrent connections, which result in overflows in the (1) SocketAddress::Connect function in libsolve/sockprot.cpp and (2) monitor_bridge function in src/bridge.cpp.
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 | tcpreen | 1.4.3-0.3 | — |
| Debian 13 | tcpreen | 1.4.3-0.3 | — |
| Debian 12 | tcpreen | 1.4.3-0.3 | — |
| Debian 4.0 | tcpreen | 1.4.3-0.1etch1 | DSA-1443-1 |
Advisories 1
- DSA-1443-1 tcpreen buffer overflows Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-1443 vendor-advisory
- 40318 vdb-entry
- 27018 vdb-entry
- tcpreen-fdset-bo(39241) vdb-entry
- http://anonsvn.remlab.net/svn/tcpreen/tags/1.4.4/NEWS
- 40317 vdb-entry
- ADV-2007-4318 vdb-entry
- 28217 third-party-advisory
- 28254 third-party-advisory