sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Apple Osx Openssh | — | Upgrade macOS to the latest versionApply OS X security update 2007-003 | Dec 16, 2011 | Sep 26, 2006 |
| Debian | — | Upgrade openssh | Jul 30, 2024 | Sep 27, 2006 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Mar 27, 2013 |
| Freebsd | — | Upgrade FreeBSDUpgrade opensshUpgrade openssh-portable | Dec 10, 2025 | Sep 30, 2006 |
| Gentoo Linux | — | Upgrade net-misc/openssh. | Oct 30, 2017 | Sep 26, 2006 |
| Suse | — | Upgrade openssh-askpassUpgrade openssh | Feb 17, 2015 | Sep 26, 2006 |
| Ubuntu | — | Upgrade openssh-server | Nov 8, 2024 | Sep 27, 2006 |
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