- ------------------------------------------------------------------------ Debian Security Advisory DSA-1456-1 This email address is being protected from spambots. You need JavaScript enabled to view it. https://www.debian.org/security/ Thijs Kinkhorst January 09, 2008 https://www.debian.org/security/faq - ------------------------------------------------------------------------ Package : fail2ban Vulnerability : programming error Problem-Type : remote Debian-specific: no CVE ID : CVE-2007-4321 Daniel B. Cid discovered that fail2ban, a tool to block IP addresses that cause login failures, is too liberal about parsing SSH log files, allowing an attacker to block any IP address. For the unstable distribution (sid), this problem has been fixed in version 0.8.0-4. For the stable distribution (etch), this problem has been fixed in version 0.7.5-2etch1. The old stable distribution (sarge) doesn't contain fail2ban. We recommend that you upgrade your fail2ban package. Upgrade instructions - -------------------- wget url will fetch the file for you dpkg -i file.deb will install the referenced file. If you are using the apt-get package manager, use the line for sources.list as given below: apt-get update will update the internal database apt-get upgrade will install corrected packages You may use an automated update by adding the resources from the footer to the proper configuration. Debian 4.0 (stable) - ------------------- Stable updates are available for alpha, amd64, arm, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc. Source archives: https://security.debian.org/pool/updates/main/f/fail2ban/fail2ban_0.7.5-2etch1.dsc Size/MD5 checksum: 704 67efd3e859d89b4b2d2e527ff09ac659 https://security.debian.org/pool/updates/main/f/fail2ban/fail2ban_0.7.5-2etch1.diff.gz Size/MD5 checksum: 21899 c1f185e48d340020de0651962fc34402 https://security.debian.org/pool/updates/main/f/fail2ban/fail2ban_0.7.5.orig.tar.gz Size/MD5 checksum: 46075 36e65b8effcfd4f4a437d214613eb916 Architecture independent packages: https://security.debian.org/pool/updates/main/f/fail2ban/fail2ban_0.7.5-2etch1_all.deb Size/MD5 checksum: 63564 afb61355977afe99b2a807a6de03685f These files will probably be moved into the stable distribution on its next update. - --------------------------------------------------------------------------------- For apt-get: deb https://security.debian.org/ stable/updates main For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
Debian: New fail2ban packages fix denial of service
Daniel B. Cid discovered that fail2ban, a tool to block IP addresses
that cause login failures, is too liberal about parsing SSH log files,
allowing an attacker to block any IP address.
