GLSA 201406-23: DenyHosts: Denial of Service
| Severity: | normal |
| Title: | DenyHosts: Denial of Service |
| Date: | 06/25/2014 |
| Bugs: | |
| ID: | 201406-23 |
Synopsis
A vulnerability in DenyHosts could allow a remote attacker to create a Denial of Service condition.Background
DenyHosts is a script intended to be run by Linux system administrators to help thwart SSH server attacks.
Affected packages
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| app-admin/denyhosts | < 2.6-r9 | >= 2.6-r9 | All supported architectures |
Description
DenyHosts does not properly define the regular expressions used when parsing SSH authentication logs.
Impact
A remote attacker could possibly cause a Denial of Service condition via a crafted login name.
Workaround
There is no known workaround at this time.
Resolution
All DenyHost users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/denyhosts-2.6-r9"
References
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.