_________________________________________________________________________________________ TurboLinux Security Announcement Ramen Worm Vulnerable TurboLinux platforms: TL Workstation 6.1 Turbolinux Server versions 6.0.5 and earlier TurboLinux Advisory ID#: TLSA2001016 References: http://www.securityfocus.com/headlines/10072 http://www.securityfocus.com/headlines/10073 http://www.securityfocus.com/archive/12/158975 http://www.linuxsecurity.com/advisories/redhat_advisory-572.html _____________________________________________________________________________________________ Although we have not received any security alerts about Turbolinux systems being infected by the Ramen Worm, the Turbolinux platforms mentioned above can be susceptible to it. Please take the proper precaution by updating the packages in your installation as soon as possible. _____________________________________________________________________________________________ 1. Problem Summary Ramen is a Linux-based Internet worm that has infiltrated web servers running Red Hat 6.2 or Red Hat 7.0 Linux using three security breaches associated with the packages nfs-utils, wu-ftpd, and LPRng. Once the worm detects the vulnerabilities, it exploits them, copies itself onto the server, and takes over root access rights. The Ramen worm can damage web- related and system files. It defaces the web site and modifies the index.html file, ul- timately replacing it with the words: "RameN Crew" and "Hackers looooooooooooooooove noodles." The main page of the web site displays the message "This site powered by" and a picture of a Top Ramen Noodles package. According to an advisory put out by CERT, it can also create denial of service attacks if altered or when destroyed files are not available. A system compromised by the worm is at high risk for "being party to attacks on other Internet sites." The three security breaches sought out by the Ramen worm are as follows: a. wu-ftpd: Buffer overrun; due to improper bounds checking, SITE EXEC may enable remote root execution, without having any local user account required. b. nfs-utils: Flaw in the rpc.statd daemon can lead to remote root break in. Please note that the nfs-utils package will replace the packages knfsd and knfsd-client. The package knfsd-client contains the rpc.statd daemon c. LPRng: Vulnerability due to incorrect usage of the syslog() function. Local and remote users can send string-formatting operators to the print- er daemon to corrupt the daemon's execution, potentially gaining root access. 2. Solution Update the packages from our ftp server by running the following command: rpm -Uvh ftp_path_to_filename Where ftp_path_to_filename is the following: ftp://ftp.turbolinux.com/pub/updates/6.0/security/nfs-utils-0.2.1-7.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/wu-ftpd-2.6.1-5.i386.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/security/LPRng-3.6.26-1.i386.rpm The source RPMs can be downloaded here: ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/nfs-utils-0.2.1-7.src.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/wu-ftpd-2.6.1-5.src.rpm ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/LPRng-3.6.26-1.src.rpm **Note: You must rebuild and install the RPM if you choose to download and install the SRPM. Simply installing the SRPM alone WILL NOT CLOSE THE SECURITY HOLE. Please verify the MD5 checksums of the updates before you install: MD5 sum Package Name --------------------------------------------------------------------------------------------- a11507768f746e6dfbe1b55705ac9b0a wu-ftpd-2.6.1-5.i386.rpm aec472f299ad23e8e1030f3aeb6733c7 wu-ftpd-2.6.1-5.src.rpm ddb4b4c0d50650c4a8acc5692b8c0f1a nfs-utils-0.2.1-7.i386.rpm 948e3c6b45db0d18b57713572575d6c8 nfs-utils-0.2.1-7.src.rpm b4366ecf26b2156d9de3c0bbdce320ca LPRng-3.6.26-1.i386.rpm a6d6ce0f0291ba42d7fa4ef063bc1107 LPRng-3.6.26-1.src.rpm _____________________________________________________________________________________________ These packages are GPG signed by TurboLinux for security. Our key is available here: http://www.turbolinux.com/security/tlgpgkey.asc To verify a package, use the following command: rpm --checksig name_of_rpm To examine only the md5sum, use the following command: md5sum name_of_rpm **Note: Checking GPG keys requires RPM 3.0 or higher. ________________________________________________________________________________________________ You can find more updates on our ftp server: ftp://ftp.turbolinux.com/pub/updates/6.0/security/ for TL6.x Workstation and Server security updates Our webpage for security announcements: http://www.turbolinux.com/security If you want to report vulnerabilities, please contact: security@turbolinux.com ________________________________________________________________________________________________ Subscribe to the TurboLinux Security Mailing lists: TL-security - A moderated list for discussing security issues TurboLinux products. 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