Short Name |
CHAT:IRC:OVERFLOW:OPENBSD-DOS |
---|---|
Severity |
Minor |
Recommended |
No |
Recommended Action |
Drop |
Category |
CHAT |
Keywords |
OpenBSD IRC Denial of Service |
Release Date |
2012/11/27 |
Update Number |
2205 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
This signature detects attempts to exploit a known vulnerability against OpenBSD. A successful attack can result in a denial-of-service condition.
The TCP stack (tcp_input.c) in OpenBSD 3.5 and 3.6 allows remote attackers to cause a denial of service (system panic) via crafted values in the TCP timestamp option, which causes invalid arguments to be used when calculating the retransmit timeout.