Description
The ssh-vulnkey tool on Ubuntu Linux 7.04, 7.10, and 8.04 LTS does not recognize authorized_keys lines that contain options, which makes it easier for remote attackers to exploit CVE-2008-0166 by guessing a key that was not identified by this tool.
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 | openssh | 1:4.7p1-10 | — |
| Debian 13 | openssh | 1:4.7p1-10 | — |
| Debian 12 | openssh | 1:4.7p1-10 | — |
| Debian 4.0 | openssh | 1:4.3p2-9etch2 | DSA-1576-1 |
Advisories 1
- DSA-1576-1 openssh openssh-blacklist - predictable randomness Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-612-5 vendor-advisory
- sshvulnkey-authorizedkeys-weak-security(42568) vdb-entry