Description
fwknop before 2.0.3 does not properly validate IP addresses, which allows remote authenticated users to cause a denial of service (server crash) via a long IP address.
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 | fwknop | 2.0.3-1 | — |
| Debian 13 | fwknop | 2.0.3-1 | — |
| Debian 12 | fwknop | 2.0.3-1 | — |
References
- fwknop-ipaddress-dos(79568) vdb-entry
- [oss-security] 20120919 CVE Request -- fwknop 2.0.3: Multiple security issues mailing-list
- [oss-security] 20120919 Re: CVE Request -- fwknop 2.0.3: Multiple security issues mailing-list
- http://www.cipherdyne.org/blog/2012/09/software-release-fwknop-2.0.3.html
- http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=263fa01f2af1d336961df320f1c7a9ea84ddac9a
- http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git%3Ba=commitdiff%3Bh=f4c16bc47fc24a96b63105556b62d61c1ba7d799
- [oss-security] 20120919 Re: CVE Request -- fwknop 2.0.3: Multiple security issues mailing-list