__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Linux-ftpd Programming Error [DSA-1217-1] November 27, 2006 18:00 GMT Number R-055 ______________________________________________________________________________ PROBLEM: The netkit ftp server switches the user id too late, which may lead to the bypass of access restrictions when running on NFS. PLATFORM: For the stable distribution (sarge) fixed in version 0.17-20sarge2 For the upcoming stable distribution (etch) fixed in version 0.17-22 For the unstable distribution (sid) fixed in version 0.17-22 DAMAGE: May lead to the bypass of access restrictions. SOLUTION: Apply current patches. ______________________________________________________________________________ VULNERABILITY The risk is LOW. May lead to the bypass of access restrictions. ASSESSMENT: ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-055.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2006/dsa-1217 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5778 ______________________________________________________________________________ [***** Start DSA-1217-1 *****] Debian Security Advisory DSA-1217-1 linux-ftpd -- programming error Date Reported: 20 Nov 2006 Affected Packages: linux-ftpd Vulnerable: Yes Security database references: In the Debian bugtracking system: Bug 384454. In Mitre's CVE dictionary: CVE-2006-5778. More information: Paul Szabo discovered that the netkit ftp server switches the user id too late, which may lead to the bypass of access restrictions when running on NFS. This update also adds return value checks to setuid() calls, which may fail in some PAM configurations. For the stable distribution (sarge) this problem has been fixed in version 0.17-20sarge2. For the upcoming stable distribution (etch) this problem has been fixed in version 0.17-22. For the unstable distribution (sid) this problem has been fixed in version 0.17-22. We recommend that you upgrade your ftpd package. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/l/linux-ftpd/linux-ftpd_0.17-20sarge2.dsc http://security.debian.org/pool/updates/main/l/linux-ftpd/linux-ftpd_0.17-20sarge2.diff.gz http://security.debian.org/pool/updates/main/l/linux-ftpd/linux-ftpd_0.17.orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_alpha.deb AMD64: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_amd64.deb ARM: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_arm.deb HPPA: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_hppa.deb Intel IA-32: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_ia64.deb Motorola 680x0: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/l/linux-ftpd/ftpd_0.17-20sarge2_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End DSA-1217-1 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. 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Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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